- botryogen
[botryogen 词源字典]
- "A magnesium-containing mineral that is an alteration product of pyrite typically occurring as reddish crystalline masses, often botryoidal or reniform", Mid 19th cent.; earliest use found in James Dana (1813–1895), geologist, zoologist, and teacher. From German Botryogen from ancient Greek βοτρυο-, combining form (in e.g. βοτρυόδωρος grape-producing) of βότρυς bunch of grapes + γενής, so called in allusion to the botryoidal habit of the mineral. For the formation compare alunogen.[botryogen etymology, botryogen origin, 英语词源]