PLAGIOCLASE


Meaning of PLAGIOCLASE in English

— plagioclastic /play'jee euh klas"tik/ , adj.

/play"jee euh klays'/ , n.

any of the feldspar minerals varying in composition from acidic albite, NaAlSi 3 O 8 , to basic anorthite, CaAl 2 Si 2 O 8 , found in most igneous rocks: shows twinning striations on good cleavage surfaces. Also called soda-lime feldspar .

[ 1865-70; PLAGIO- + -CLASE ]

Random House Webster's Unabridged English dictionary.      Полный английский словарь Вебстер - Random House .