troctolite

noun troc·to·lite \ ˈträktəˌlīt \

Definition of troctolite

plural -s

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

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Origin and Etymology of troctolite

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