a silicate mineral with chemical formula NaFeSi2O6, consisting of pyramid-shaped crystals; aegirite
acmite in American English
(ˈækmait)
noun
a rare pyroxene mineral, sodium-ferric iron silicate, NaFe(Si2O6), found in feldspathoid rocks
Word origin
[1830–40; ‹ Gk akm(e᷄) sharp point + -ite1]This word is first recorded in the period 1830–40. Other words that entered Englishat around the same time include: ante, baby talk, orientation, rococo, showcase-ite is a suffix of nouns denoting esp. persons associated with a place, tribe, leader,doctrine, system, etc. (Campbellite; Israelite; laborite); minerals and fossils (ammonite; anthracite); explosives (cordite; dynamite); chemical compounds, esp. salts of acids whose names end in -ous (phosphite; sulfite); pharmaceutical and commercial products (vulcanite); a member or component of a part of the body (somite)