calciferous (adj) – of or pertaining to calcium
BREAKDOWN: CALC- (calcium) + -IFEROUS (bearing)
This word is built on the root CALC-, which means small stone, pebble used for counting, lime or calcium, or heel.
Common CALC- words include calcium, calculator, chalk, and miscalculate.
More esoteric CALC- words include calx, calcareous, and calculous.