nounWord forms: Latin genitiveGeminorum (ˌdʒɛmɪˈnɔːrəm)
1. astronomy
a zodiacal constellation in the N hemisphere lying between Taurus and Cancer on the ecliptic and containing the stars Castor and Pollux
2. classical mythology another name for Castor and Pollux
3. astronautics
any of a series of manned US spacecraft launched between the Mercury and Apollo projects to improve orbital rendezvous and docking techniques
4. astrology
a. Also called: the Twins
the third sign of the zodiac, symbol ♊, having a mutable air classification and ruled by the planet Mercury. The sun is in this sign between about May 21 and June 20