troctolite Min.
(ˈtrɒktəʊlaɪt)
Also trok-.
[ad. Ger. troktolit (Von Lasaulx, 1875), f. Gr. τρώκτης a kind of sea-fish (taken as = trout) + λίθος stone: see -lite.]
(See quot. 1892.)
| 1883 Science I. 342/2 The term ‘troktolite’ is the equivalent of the more common ‘forellenstein’. 1892 Chambers' Encycl. X. 301 Troctolite (trout-stone), a variety of Gabbro, composed almost entirely of white felspar..and dark olivine. |