adj. 1. Circular or spherical. 2. Botany Circular and flat. Used especially of leaves. [Middle English orbiculer, from Old French orbiculaire, from Late Latin orbiculāris, from Latin orbiculus, diminutive of orbis, circle, disk; see orbh- in the Appendix of Indo-European roots.] or·bic′u·lari·ty (-lărĭ-tē) n. or·bicu·lar·ly adv. ![]() (click for a larger image) orbicularorbicular leaf |
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