a. [ See Icosahedron. ] (Geom.) Having twenty equal sides or faces. [ 1913 Webster ]
n. [ Gr. &unr_;; &unr_; twenty + &unr_; seat, base, fr. &unr_; to sit. ] (Geom.) A solid bounded by twenty sides or faces. [ 1913 Webster ]
Regular icosahedron,
‖n. pl. [ NL., fr. Gr. &unr_; twenty +&unr_;, &unr_;, man, male: cf. F. icosandrie. ] (Bot.) A Linnæan class of plants, having twenty or more stamens inserted in the calyx.
n. The type genus of the family
n. The mucus-secreting membrane lining all body cavities or passages that communicate with the exterior; called also
‖n. pl. [ NL., fr. Gr.
n.
prop. n.