a northern constellation (the Twins), said to represent the twins Castor and Pollux, whose names are given to its two brightest stars

the third sign of the zodiac, which the sun enters about 21 May

a series of twelve manned American orbiting spacecraft, launched in the 1960s in preparation for the Apollo programme

a person born when the sun is in the sign of Gemini

used with preceding Greek letter or numeral to designate a star in the Gemini constellation

the star Eta Geminorum