TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

Coal that absorbs rather than reflects light, containing mostly durain and fusain lithotypes.  2, record 1, English, - dull%20coal

Record number: 1, Textual support number: 1 OBS

An early division was into three types: bright coal, dull coal and mineral charcoal (or mother of coal). Another system [divided coal into] four types: fusain, durain, clarain, and vitrain. This coincided with the classification put forward by ... the United States Bureau of Mines where coal is divided into anthraxylon - bright layers of plant material and attrius - darker debris material. Today coal classification is based on the organic material seen using different optical microscopic techniques. There are three main groups: liptinite (or exinite), vitrinite and inertinite with many further divisions [within these three groups].  3, record 1, English, - dull%20coal

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Charbon lité de couleur grise et d'aspect mat.  1, record 1, French, - charbon%20mat

Record number: 1, Textual support number: 1 OBS

Ce peut être soit du durain, soit un charbon à forte teneur en matières minérales.  1, record 1, French, - charbon%20mat

Record 1,  Textual support,  Spanish