feldspathoid

 
Pronunciation: /ˈfɛl(d)spəˌθɔɪd/

noun

Geology
  • any of a group of minerals chemically similar to feldspar but containing less silica, such as nepheline and leucite.

Derivatives

feldspathoidal

Pronunciation: /-ˈθɔɪd(ə)l/
adjective