単たん斜しゃ晶しょう系けい

noun

monoclinic crystal system

Technical term in geology and crystallography. Refers to one of the seven crystal systems, characterized by three unequal axes with one oblique intersection.

• 石せっ膏こうは単たん斜しゃ晶しょう系けいに属ぞくする鉱こう物ぶつです。

  Gypsum is a mineral that belongs to the monoclinic crystal system.