variant of spheno- before a vowel:
noun 1. a mineral, calcium titanium silicate, CaTiSiO 5 , occurring as an accessory mineral in a variety of crystalline rocks, usually in small wedge-shaped crystals. noun 1. a brown, yellow, green, or grey lustrous mineral consisting of calcium titanium silicate in monoclinic crystalline form. It occurs in metamorphic and acid igneous rocks and is […]
adjective 1. being in the shape of a wedge; wedge-shaped. adjective 1. having the shape of a wedge
sphenion sphe·ni·on (sfē’nē-ŏn’) n. The tip of the sphenoidal angle of the parietal bone, used as a craniometric point.
1. a combining form meaning “wedge,” used in the formation of compound words: sphenography. combining form 1. having the shape of a wedge: sphenogram spheno- or sphen- pref. Wedge; wedge-shaped: sphenocephaly.