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a unit of volume for liquor, usually considered equal to 1.5 U.S. fluid ounces or 44.360 milliliters.
a traditional unit of weight in China, comparable to the English pound.  In China,  the current jin is a metric unit equal to exactly 500 grams (1.1023 pounds) and divided into 10 liang.  The old  jin was identified with the catty, a Malay unit widely used throughout East and Southeast Asia. It is equal to 1 1/3 pounds or 604.79 grams. Traditionally, it was divided into 16 liang. The kilogram itself is usually called the gongjin, or "metric jin." The spellings chin and gin also have been used for the jin.
a traditional unit of land area in the Czech Republic, identical to the Austrian joch.
an informal unit of area used in Japan to measure the size of rooms in houses and apartments. One jo is the area of a traditional tatami mat, 180 by 90 centimeters or 1.62 square meters, 1.94 square yards.
a traditional unit of area in German speaking countries. One joch is the area of a square 40 klafters (about 83 yards) on a side, or 0.5755 hectare, about 1.422 acres. The plural is joche. Joch is also the word for a yoke in German, In the Czech Republic it was known as the jitro; in Croatia it is the jutro.
the SI unit of work or energy, defined to be the work done by a force of one newton acting to move an object through a distance of one meter in the direction in which the force is applied.  In other energy units, one joule equals about 9.478 170 x 10-4 Btu, 0.238 846 (small) calories, or 2.777 778 x 10-4 watt hour. It is named for the British physicist James Prescott Joule (1818-1889), who demonstrated the equivalence of mechanical and thermal energy in a famous experiment in 1843. 
Julian year
the average length of the year in the Julian calendar, equal to exactly 365.25 days.
a unit of mass, now being used in astronomy to express the masses of new planets being discovered in orbit around various stars.  It's equal to the mass of the planet Jupiter, estimated to be about 1.899 x 1024 metric tons.


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