troctolite

noun

troc·​to·​lite

ˈträktəˌlīt

plural -s

: gabbro that is chiefly labradorite and olivine with little or no pyroxene

Word History

Etymology

German troktolit, from Greek trōktēs, a sea fish (in Late Latin trocta, a trout) + German -lit -lite; from the resemblance to the speckled skin of a trout

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