c.1600, of blood, from French circulatoire or directly from Latin circulatorius, from circulator, agent noun from circulare (see circulate). Circulatory system is recorded from 1862.
1540s (late 15c. as a past participle adjective), as a chemical term for alternating vaporization and condensation, from Latin circulatus, past participle of circulare "to form a circle," from circulus (see circle (n.)). Meaning "to move around, revolve" is from 1670s; of blood, from 1650s; of persons, "to mingle in a social gathering," from 1863. Sense of "to pass about freely" is from 1660s; of newspapers from 1885. Related: Circulated; circulating.
circulatory cir·cu·la·to·ry (sûr'kyə-lə-tôr'ē)
n.
Relating to circulation.
Relating to the circulatory system.