1. (mineralogy) two interwoven crystals that are mirror images on each other
   "The geologist found beautiful quartz twins in the rock sample"

1. The third sign of the zodiac; the sun is in this sign from about May 21 to June 20
   - Gemini, Gemini the Twins

1. Either of two offspring born at the same time from the same pregnancy
   "The identical twins often confused their teachers at school"
    
2. A duplicate copy
   "He made a twin of the original document";
   - counterpart, similitude
    
3. A room in a hotel, guesthouse, etc. with two beds
   "We booked a twin for our stay";
   - twin room

1. Duplicate or match
   "The polished surface twinned his face and chest in reverse";
   - duplicate, parallel
    
2. Bring two objects, ideas, or people together
   "The designer twinned modern and traditional elements";
   - match, mate, couple, pair
    
3. Grow as twins
   "twin crystals"
    
4. Give birth to twins
   "The cat twinned, surprising her owners"

Type of: agree, bear, birth, check, correspond, crystal, deliver, duplicate, duplication, fit, gibe, give birth, grow, have, house, jibe, join, mansion, marry, marry up, match, planetary house, sib, sibling, sign, sign of the zodiac, square, star sign, tally

Encyclopedia: Twins, conjoined