ˈkælsɪəm n. a
soft grey metallic element of
the alkaline earth group occurring
naturally in
limestone,
marble,
chalk,
etc.,
that is
important in
industry and essential for normal growth in
living organisms. °Symb.:
Ca. øcalcium
carbide a greyish
solid used in the
production of
acetylene. calcium
carbonate a
white insoluble solid occurring naturally as chalk, limestone, marble, and
calcite, and used in the
manufacture of lime and
cement. calcium
hydroxide a white
crystalline powder used in the manufacture of
plaster and cement; slaked lime. calcium
oxide a white crystalline solid
from which many calcium compounds are manufactured:
also called
QUICKLIME,
CALX. calcium
phosphate the main
constituent of
animal bones and used as
bone ash fertilizer. calcium
sulphate a white crystalline solid occurring as
anhydrite and
gypsum. [L CALX lime + -IUM]