orbiculate

adjective

or·​bic·​u·​late ȯr-ˈbi-kyə-lət 

: circular or nearly circular in outline

an orbiculate leaf

see leaf illustration

Word History

Etymology

borrowed from Latin orbiculātus, from orbiculus "circular figure, small disk" (from orbis "disk, circle" + -culus, diminutive suffix) + -ātus -ate entry 3 — more at orb entry 1

First Known Use

circa 1650, in the meaning defined above