| 释义 |
clarain|ˈklæreɪn|
[f. L. clārus clear a. + F. -ain -ane.]
A kind of coal; an ingredient of coal (see quots.).
1919M. C. Stopes in Proc. R. Soc. B. XC. 472 These four distinguishable ingredients, all of which..are to be found in most ordinary bituminous coals, I name provisionally as follows:—(i) Fusain. (ii) Durain. (iii) Clarain. (iv) Vitrain. Together the equivalent of ‘bright’ or glance coal of various authors. 1924Glasgow Herald 4 Mar. 9/1 The clarain and vitrain bands were relatively highly coking. 1960Gloss. Coal Terms (B.S.I.) 6 Clarain, bright coal, less lustrous than vitrain; usually very finely striated. |