orthophyric
/ˌɔːθə(ʊ)ˈfɪrɪk/Geology
adjective
Characterized by or designating a rock texture in which there is a groundmass of randomly oriented, short, stout feldspar crystals of rectangular or square cross-section.
Origin
Late 19th century; earliest use found in Alfred Harker (1859–1939), petrologist. From orthophyre + -ic, after German orthophyrisch.