Defn: Closely resembling; being a counterpart.
— Twin"like`ness, n.

TWINLING
Twin"ling, n. Etym: [Twin + 1st -ling.]

Defn: A young or little twin, especially a twin lamb.

TWINNED
Twinned, a. (Crystallog.)

Defn: Composed of parts united according to a law of twinning. See
Twin, n., 4.

TWINNER
Twin"ner, n.

Defn: One who gives birth to twins; a breeder of twins. Tusser.

TWINNING
Twin"ning, n. (Crystallog.)

Defn: The assemblage of two or more crystals, or parts of crystals, in reversed position with reference to each other in accordance with some definite law; also, rarely, in artificial twinning (accomplished for example by pressure), the process by which this reversal is brought about. Polysynthetic twinning, repeated twinning of crystal lamellæ, as that of the triclinic feldspars. — Repeated twinning, twinning of more than two crystals, or parts of crystals. — Twinning axis, Twinning plane. See the Note under Twin, n.

TWINTER
Twin"ter, n. Etym: [AS. twi- + winter winter. See Twice, and Winter.]