from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A constellation in the Northern Hemisphere containing the stars Castor and Pollux.
  • noun The third sign of the zodiac in astrology.
  • noun One who is born under this sign.

from The Century Dictionary.

  • A zodiacal constellation, giving its name to a sign of the zodiac, lying east of Taurus, on the other side of the Milky Way.
  • (jem′ i-ni, according to the older E. pronunciation of Latin; also, corruptly, jim′ i-ni). [Also written geminy, gemony, jiminy; in the phrase O Gemini, or simply Gemini, i.e., by the Twins, i. e., Castor and Pollux; in E. orig. as an imitation of classical use, to swear by Castor and Pollux being a favorite oath of the Romans.] A word used as a form of mild oath or interjection.
  • [Also spelled geminy, and sometimes used as a sing. noun.] A pair; specifically, a pair of eyes.

from the GNU version of the Collaborative International Dictionary of English.

  • noun plural (Astron.) A constellation of the zodiac, containing the two bright stars Castor and Pollux; also, the third sign of the zodiac, which the sun enters about May 20th.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • proper noun astronomy : A constellation of the zodiac supposedly shaped like a pair of twins. It contains the stars Castor and Pollux.
  • proper noun astrology : The zodiac sign for the twins, ruled by Mercury and covering May 22 - June 21 (tropical astrology) or June 16 - July 15 (sidereal astrology).
  • noun Someone with a Gemini star sign

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun (astrology) a person who is born while the sun is in Gemini
  • noun a zodiacal constellation in the northern hemisphere between Taurus and Cancer on the ecliptic
  • noun the third sign of the zodiac; the sun is in this sign from about May 21 to June 20


from The American Heritage® Dictionary of the English Language, 4th Edition

[Middle English, from Latin Geminī, pl. of geminus, twin.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin geminī, plural of geminus ("twin").


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