lamprophyre
noun
lam·pro·phyre
ˈlamprəˌfī(ə)r
plural -s
: any of a series of dark rocks of basaltic habit that resemble trap, occur usually in narrow dikes, and sometimes contain glittering plates of biotite
lamprophyric adjective
¦⸗⸗¦firik
-fīr-
Word History
Etymology
International Scientific Vocabulary lampro- + -phyre; originally formed as German lamprophyr