> as lemmas
pyroschist
pyroschist n.
Brit. 
/ˈpʌɪrə(ʊ)ʃɪst/
, /ˈpʌɪrə(ʊ)ʃɪst/U.S. /ˈpaɪrəˌʃɪst/
Geology (now rare) a schist or shale with a high carbon content, which burns or yields volatile hydrocarbons or flammable gas when heated./ˈpaɪrəˌʃɪst/ΚΠ
1861 T. S. Hunt in Canad. Naturalist & Geologist 6 242 These inflammable or lignitic shales, which may be conveniently distinguished by the name of pyroschists, (the brandschiefer of the Germans) are to be carefully distinguished from rocks containing ready-formed bitumen.
1920 A. W. Grabau Textbk. Geol. xviii. 580 Shales... When extremely rich in carbonaceous material they are called pyroschists.
<
as lemmas
- arachnoid
- arachnoid coat
- arachnoidal
- arachnoideal
- arachnoidean
- arachnoideous
- arachnoiditis
- arachnoids
- arachnological
- arachnologist
- arachnologists
- arachnology
- arachnophobe
- arachnophobes
- arachnophobia
- arachnophobias
- arachnophobic
- arad
- araeometer
- araeometers
- araeometric
- araeometrical
- araeometry
- araeostyle
- araeostyles