Note: ☞ Three is often joined with other words, forming compounds signifying divided into composed of, or containing three parts portions organs, or the like; as, three-branched, three-capsuled, three-celled, three-cleft, three-edged, three-foot, three-footed, three-forked, three-grained, three-headed, three-legged, three-mouthed, three-nooked, three-petaled, three-pronged, three-ribbed, three-seeded, three-stringed, three-toed, and the like.
Etymology: OE. þre þreo þri, AS. þrī, masc., þreó, fem. and neut.; akin to OFries. thre, OS. thria threa, D. drie, G. drei, OHG. drī, Icel. þrīr, Dan. & Sw. tre, Goth. þreis, Lith. trys, Ir., Gael. & W. tri, Russ. tri, L. tres, Gr. trei^s, Skr. tri. √301. Cf. 3d Drilling Tern (a.) Third Thirteen Thirty Tierce Trey Tri- Triad Trinity Tripod