|1.||a. either of two persons or animals conceived at the same time|
|b. identical See also fraternal (as modifier): a twin brother|
|2.||a. either of two persons or things that are identical or very similar; counterpart|
|b. (as modifier): twin carburettors|
|3.||Also called: macle a crystal consisting of two parts each of which has a definite orientation to the other|
|—vb , twins, twinning, twinned|
|4.||to pair or be paired together; couple|
|5.||(intr) to bear twins|
|6.||(intr) (of a crystal) to form into a twin|
|7.||archaic (intr) to be born as a twin|
|a. to create a reciprocal relation between (two towns in different countries); pair (a town) with another in a different country|
|b. (intr) (of a town) to be paired with a town in a different country|
|[Old English twinn; related to Old High German zwiniling twin, Old Norse tvinnr double]|
One of two offspring born at the same birth. adj.
Being two or one of two offspring born at the same birth.
Consisting of two identical or similar parts; double.
|twin (twĭn) Pronunciation Key