twins

from WordNet (r) 3.0 (2006)

twins
    n 1: (mineralogy) two interwoven crystals that are mirror images
         on each other
    2: the third sign of the zodiac; the sun is in this sign from
       about May 21 to June 20 [syn: {Gemini}, {Gemini the Twins},
       {Twins}]

from Who Was Who: 5000 B. C. to Date

TWINS

Siamese, two men who were closer than brothers.