[eu.clase] n [F, fr. eu- (fr. L) + Gk klasis breaking, fr. klan to break] (1804): a mineral that consists of a brittle silicate of beryllium and aluminum in pale-yellow, green, or blue prismatic crystals and is used esp. as a gemstone
EUCLASE
Meaning of EUCLASE in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012