calculous

As a noun operation

is operation (method by which a device performs its function).

As an adjective calculous is

(pathology) of, pertaining to or containing calculi.

In pathology|lang=en terms the difference between calculous and acalculous

is that calculous is (pathology) of, pertaining to or containing calculi while acalculous is (pathology) not affected with, or caused by calculi (eg gallstones).

As adjectives the difference between calculous and acalculous

is that calculous is (pathology) of, pertaining to or containing calculi while acalculous is (pathology) not affected with, or caused by calculi (eg gallstones).

As a noun calculus

is calculation, computation.

As an adjective calculous is

of, pertaining to or containing calculi.

Calculary is a synonym of calculous.

As adjectives the difference between calculary and calculous

is that calculary is (medicine) of or relating to calculus (stony concretions) while calculous is (pathology) of, pertaining to or containing calculi.