- psephite
[psephite 词源字典]
- "A coarse-grained breccia, conglomerate, or similar sedimentary rock; (in later use) specifically such a rock after metamorphic alteration", Early 19th cent.; earliest use found in Henry Thomas De la Beche (1796–1855), geologist. From ancient Greek ψῆϕος pebble, round stone + -ite, after French psêfite.[psephite etymology, psephite origin, 英语词源]