keratophyre
noun
ker·a·to·phyre
ˈkerətōˌfī(ə)r
plural -s
1
: any of various rocks resembling hornfels
2
: a compact porphyritic rock with anorthoclase as its prevailing feldspar and with or without quartz
Word History
Etymology
International Scientific Vocabulary kerat- + -phyre; originally formed as German keratophyr