trass

n. 火山灰

发音

UK /tɹɑːs/
其它
US /tɹæs/

词形变化

trasses 复数 trasses

别名

tarrace tarras terras

释义与例句

n.
  1. 1.

    A white to grey volcanic tufa, formed of decomposed trachytic cinders, sometimes used as a cement.

    可数 不可数 地质
  2. 2.

    A coarse sort of plaster or mortar, durable in water, and used to line cisterns and other reservoirs of water.

    可数 不可数

词源

From Dutch tras or German Trass, probably from Italian terrazzo (“terrace”). See terrace.

来源：wiktionary