n. To cut or form in pairs by cutters or chisels.Two; twain.Consisting of two separate, closely related, and equal members; twofold; double; specifically, consisting of or forming twins or a pair: as, twin children.One, each, or either of two; one of a pair, specifically of two born at a birth: as, a twin brother or sister.In botany, growing in pairs; didymous.Consisting of two chief parts alike, or nearly alike, and held firmly together: as, a twin bottle; a twin vase. The plural is used in the same sense: as, twin vases.In entomology, geminate: applied to spots, punctures, spines, etc., which are close together in pairs, and distant from others.n. Two; twain; a pair; a couple.n. One of two; one of a pair or couple linked together by a particular tie or relation; the mate, counterpart, or fellow of another; specifically, one of two creatures produced at a birth: said of the young both of hitman beings and of beasts.n. A compound crystal one part of which is in a reversed position with reference to the other, as if it had been revolved through 180° about an axis (twinning-axis) perpendicular to a plane which is called the twinning-plane, and is usually a fundamental plane of the given Crystal.To couple; pair; mate; join intimately or link together; said of two united or of one joined to another.Specifically, in mineralogy, to form or unite into a compound or twin crystal by a reversal of the molecular structure according to some definite law.To be coupled or paired; be mated, as one with another; specifically, to be twin-born.To bring forth two at a birth.To be parted in twain; be divided or sundered; come apart.To part; depart; go away.To be separated (from) or deprived (of): as, to twin with one's gear.To part in twain; sever; sunder.To part, as from another person or thing; separate; sunder; especially, to deprive.