sb. [= Da., Sw. trilling, Norw. trinnling, Du. drieling, Ger. drilling triplet, f. TRI- + -LING.] One of a set of three. a. One of three children born at the same birth; a triplet.
b. Min. A crystal composed of three individuals.
1846. Worcester, Trilling, one of three children born at the same birth. For. Q. Rev.
1864. in Webster (citing Wright).
1896. Chester, Dict. Min., Tridymite,… f. τρίδυμος, ‘triplet,’ because often found in trillings.
Trilling, vbl. sb. and ppl. a.: see TRILL v.1–3.
