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The description of the word you requested from the astronomical dictionary is given below.
A moon of 99 km diameter at about 221,900 km from the planet Jupiter. The gravity at its surface is about 0.0041 times as strong as on Earth. The moon goes once around its planet in about 16.2 hours. The moon was discovered in 1979. Also called JXIV (Jupiter fourteen). Its provisional designation was S/1979 J2.