9 Grammatical Pitfalls
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)
Relating to circulation.
Relating to the circulatory system.