lamprophyre

noun
lam·pro·phyre | \ˈlamprəˌfī(ə)r\
plural -s

Definition of lamprophyre 

: 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

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Other Words from lamprophyre

lamprophyric \¦⸗⸗¦firik, -fīr- \ adjective

History and Etymology for lamprophyre

International Scientific Vocabulary lampro- + -phyre; originally formed as German lamprophyr

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