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