 tablespoon

a unit of volume used in food recipes. In the U.S., the tablespoon is equal to
1/2 fluid ounce, about 14.8 milliliters, equals 3 teaspoons or 1/16 cup .
In Canada, the traditional tablespoon is 1/2 Imperial fluid ounce (14.2
milliliters). In Britain, traditional tablespoons varied in the range from 1/2
to 5/8 Imperial fluid ounce (14.217.6 milliliters), equal to 4 teaspoonfuls or
1/10 teacupful. Under the metric system the tablespoon has standardized at 15
milliliters in Britain, Canada, and New Zealand, 20 milliliters in
Australia. The metric tablespoon equals 3 teaspoons (4 in Australia).
 tael or tahil

a traditional unit of weight used throughout eastern Asia. The tael was
standardized throughout the region at 4/3 ounce avoirdupois (1/16 catty, 1/12
pound, or about 37.8 grams). In Japan, the tael was is equal to 1.323
ounces (37.51 grams). The tael is usually considered equal to the Chinese
liang.
 talangwah

the square wah, a common unit of area in Thailand, equals to exactly 4 square
meters or 43.0556 square feet. There are 100 talangwah in 1 ngarn, 400 in 1
rai.
 talent

a historic unit of weight. The Hebrew sacred talent, mentioned in the Bible,
was equal to 60 minas or about 30 kilograms (66 pounds). The Greek talent, also
equal to 60 minas, was smaller, 25.8 kilograms or about 57 pounds.
 tan

a traditional Chinese weight unit, called dan now (see dan
). During the European colonial era the tan was equal to 100 cattys or
1600 taels (133.333 pounds). In modern China, it is equal to 100 jin, which is
exactly 50 kilograms (110.231 pounds).

a traditional unit of land area in Japan equal to 10 se or about 991.7 square
meters (0.099 hectare or 0.245 acre).
 tarea

a traditional unit of land area in the Dominican Republic and the Central
America. The tarea is generally equal to 900 square varas. In the Dominican
Republic, the tarea equals about 628 square meters or 751 square yards (0.0628
hectare or 0.155 acre). The Spanish word tarea means a task or job,
originated as the area to work in a given time.
 tarefa

a traditional unit of land area in Brazil, generally at least 3000 square
meters (0.3 hectare or 0.741 acre), between 3025 square meters (0.3025 hectare
or 0.748 acre) and 4356 square meters (0.4356 hectare or 1.076 acre). The
Portuguese word tarefa, like the Spanish tarea, means a task or
job.
 tatami

a Japanese unit of area, equal to the area of a traditional tatami mat,
0.5 ken by 1 ken or about 90 centimeters by 180 centimeters (1.62 square meters
or 17.5 square feet). It is used especially for measuring the area of
rooms in houses and apartments, is also called the jo.
 teaspoon

a unit of volume used in food recipes. The U.S. teaspoon is equal to 1/3
tablespoon or 1/48 cup (1/6 fluid ounce, about 0.30 cubic inches, or 4.9
milliliters). In Britain, Canada, Australia, and New Zealand, a
teaspoonful is exactly 5 milliliters.
 tera

a metric prefix meaning 10^{12}, or one trillion. The prefix was
derived from the Greek word for monster, teras.
 tertian

a traditional unit of volume for liquids. The tertian in the
Latin means 1/3. It equals 1/3 tun, 2 tierces or 84 U.S. gallons
(about 318 liters).
 tetrad

a unit of quantity equal to 4.

a unit of digital information equal to 4 bits or 1/2 byte.
 third

a unit used in music to describe the ratio in frequency between notes. Two
notes differ by a minor third if the higher note has frequency exactly
6/5 times the frequency of the lower one, or by a major third if the
higher note has frequency exactly 5/4 times the frequency of the lower one.
 thou

a unit of distance equal to 0.001 inch (25.4 micrometers). A British name
for mil in Americans
 thread

a traditional unit of length for cotton yarn, equal to 54 inches (1.5 yards, or
137.16 centimeters). There are 80 threads in a skein or lea.
 thumb

another name for an inch.
 tical

a traditional unit of weight in southeast Asia. In Burma, the unit is
still in use for measuring the weights of precious metals and drugs, the tical
is equivalent to 16.4 grams.
 tick

an informal unit of time equal to the length of one cycle of a clock. A tick of
a computer system's clock, also called a jiffy, is usually 0.01 second. A tick
in athletics is the smallest increment of time measured in a timed competition,
usually 0.1 second or 0.01 second.

a unit used in finance and investing to express the smallest measured change in
a price or index. For example, at the Chicago Board of Trade in the U.S. a tick
in the price of many agricultural commodities is equal to 1/4 cent ($0.0025)
per bushel.
 tidal day

a unit of time equal to the period between two successive passages of the moon
through the meridian. High and low tides repeat with this period, so the unit
is fundamental to predictions of these tides. It is also called the lunar day,
equal to 24 hours 50.272 minutes.
 tierce

an old English unit of volume, equal to 1/3 butt or 42 United States gallons,
almost exactly 159 liters. The name of the unit is French, derived from the
Latin tertius meaning 1/3. The tierce is identical to the petroleum
barrel
 timber

a traditional unit of quantity for furs equal to 2 score or
40. This unit originated because furs were shipped in bundles of 40 pressed
between two boards or timbers.
 tithe

a traditional unit of proportion equal to 1/10. The word "tithe" is drawn
directly from the AngloSaxon word for a tenth.
 to

a traditional Japanese unit of volume. The to equals 10 sho, which is about
18.039 liters, 3.968 British imperial gallons, or 4.765 U.S. liquid gallons.
 tod

a traditional unit of weight equal to 1 quarter, that is,
28 pounds or about 12.7 kilograms. "Tod" is a German word meaning a load.
 tola

a traditional unit of weight in India and South Asia. The official size
in ndia was 180 grains, about 0.4114 ounce (avoirdupois) or 11.664 grams.
There are 80 tolas in a seer, 3200 in a maund.
 toman

a historic unit of quantity equal to 10,000. It is still in several languages
of western Asia and is used today in Turkey and Iran, originally from ancient
Persian.
 ton

a traditional unit of weight equal to 20 hundredweight. In the United States
and Canada, there are 100 pounds in the hundredweight and exactly 2000 pounds
(907.185 kilograms) in the ton. In Britain, there are 112 pounds in the
hundredweight and 2240 pounds (1016.047 kilograms) in the ton. The
British ton is called the long ton and the American one is the
short ton .

a metric unit of mass, equal to 1000 kilograms, or approximately 2204.623
pounds avoirdupois. The metric ton is smaller than the British
long ton. The metric ton is now known officially as the tonne .

a unit used traditionally to measure the cargo capacity of a merchant ship.
Today, the merchant marine ton is defined to be exactly 100 cubic feet, or
approximately 2.8316 cubic meters. This unit is often called the register
ton , since it is recorded in official registers of ships.

a traditional unit of volume used for measuring the cargo of a ship, truck,
train, or other freight carrier, called freight ton: 40
cubic feet, or approximately 1.1326 cubic meters. it is often called the measurement
ton (MTON) . The freight ton is also called the U.S. shipping
ton; the British shipping ton is 5% larger at 42
cubic feet (1.1893 cubic meters).
 ton

British slang for 100, especially the sum of 100 pounds, a speed of 100 miles
per hour, or a score of 100 in darts or cricket.
 tønde

a unit for the Danish "barrel," traditionally used as a unit of
volume equal to 144 pots or about 139 liters. The tønde holds
30.6 British imperial gallons, making it comparable to the barrel
.
 tønde land

a traditional Danish unit of land area, originally the area that could be
planted with a tønde of seed. The tønde land equals 14 000 square alen, which
is about 5516 square meters, 0.5516 hectare, or 1.363 acre.
 tone

another name for the step as a musical unit describing the ratio in frequency
between notes.
 tonelada

a traditional weight unit of Spain and Portugal corresponding to the English
and metric ton. The Spanish tonelada equals 2000 libras or about 2028
pounds (919.9 kilograms). The Portuguese tonelada, however, equals 1728
Portuguese libras or arratels, about 1748.6 pounds or 793.15 kilograms.
 tonne

a metric unit of mass equal to 1000 kilograms or approximately 2204.623 pounds
avoirdupois. The SI uses this French format for the metric ton
to distinguish it clearly from the long and short tons of customary English
usage. In the United States, the Department of Commerce recommends that the
tonne be called the metric ton.
 tonneau

the traditional French ton, equals to about 979 kilograms (1.079 U.S. ton). The
tonneau was also used as a measure of volume equal to 42 cubic pieds (50.84
cubic feet, or about 1440 liters). In the wine trade, the tonneau was a
shipment of 100 cases, or 1200 bottles (about 900 liters of wine).
 tot

a unit of volume for liquor. Generally the term is used informally, with no
fixed definition. However, in British pubs the usual understanding is that a
tot is 1/6 gill; this is equivalent to 5/6 Imperial fluid ounce or about 23.7
milliliters.
 tour

another name for a shift in the oil industry. A tour, like a shift, is
usually 8 hours in length.
 tovar

a traditional weight unit of Bulgaria, equal to 100 oka; this is roughly 280
pounds or 128 kilograms.
 township

a traditional unit of area in the U. S., equal to 36 sections or
the area of a square 6 miles on a side (93.24 square kilometers). Like the
section, this unit is used by the U.S. Public Land Survey System for the most
U.S. states except for the original 13 states, Alaska, and Hawaii.
 triad

a unit of quantity equal to 3.
 triennial

an adjective meaning once every 3 years. Not to be confused with terannual (3
times per year).
 triennium

a traditional unit of time equal to 3 years.
 trilliard

a unit of quantity equal to 10^{21} . The name is coined to
parallel milliard, which has been a name for 1000 million.
 trimester

a unit of time equal to 3 months or 1/4 year; another name for the quarter. At
certain U.S. colleges a trimester is an academic term roughly 14 weeks long.
 trio

a traditional unit of quantity equal to 3. The word is Italian.
 triple, triplet

a group of 3 items, especially 3 identical items; the word triplet is
also used for one member of such a group; triple for a set of three
elements.
 triumvirate

a unit of quantity equal to 3. The name comes from the Latin trium virum,
"of three men" .
 troy weights

a traditional English weight system. The system is believed to be named for the
French market town of Troyes, where English merchants traded at least as early
as the time of Charlemagne (early ninth century). The system is based on the
troy pound of 5760 grains. The pound was divided into 12 ounces (480 grains)
each containing 20 pennyweight (24 grains). Apothocaries, however, divided the
troy ounce into 8 drams (60 grains) each containing 3 scruples (20 grains). The
prices of precious metals are still quoted by the troy ounce.
 trug

a basket having a shallow, boatlike shape. In the U.S., a trug of grain
was formerly considered to equal exactly 2/3 U.S. bushel (23.493 liters).
 truss

a traditional weight unit, generally equal 56 pounds (about 25.4 kilograms).
The truss was used primarily for measuring hay.
 tsubo

an informal unit of area used in Japan to measure area inside buildings. One
tsubo is an area of about 3.3 square meters (3.95 square yards).
 t'sun

a Chinese unit of distance equal to 0.1 ch'ih or about 1.41 inches (3.58
centimeters). The unit is also spelled cun
 tumbler

another name for the U.S. cup.
 turn

another name for a revolution, a unit of angle measure equals to 360°.
