feldspathoid
[ feld-spa-thoid, fel- ]
/ ˈfɛld spæˌθɔɪd, ˈfɛl- /
adjective
Also feld·spath·oi·dal.
of or relating to a group of minerals similar in chemical composition to certain feldspars except for a lower silica content.
noun
a mineral of this group, as nepheline.
Words nearby feldspathoid
feldene,
feldenkrais method,
feldsher,
feldspar,
feldspathic,
feldspathoid,
felice,
felicia,
felicific,
felicitate,
felicitation
British Dictionary definitions for feldspathoid
feldspathoid
/ (ˈfɛldspəˌθɔɪd) /
noun
any of a group of rock-forming minerals, such as leucite and sodalite, that are similar to feldspars but contain less silica
Scientific definitions for feldspathoid
feldspathoid
[ fĕld-spăth′oid′, fĕl- ]
Any of a group of relatively rare minerals that are chemically very similar to feldspars, but have too little silica to qualify as feldspars. Feldspathoids occur in igneous rocks with little or no silica.