De‐riv″a‐tive (?), a. [L. derivativus: cf. F. dérivatif.] Obtained by derivation; derived; not radical, original, or fundamental; originating, deduced, or formed from something else; secondary; as, a derivative conveyance; a derivative word.
Derivative circulation, a modification of the circulation found in some parts of the body, in which the arteries empty directly into the veins without the interposition of capillaries. Flint.
— De‐riv″a‐tive‐ly, adv. — De‐riv″a‐tive‐ness, n.