Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Ring-shaped.
  • adj. Botany Rolled up in the form of a coil with the tip in the center, as an unexpanded fern frond.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Used of leaves or similar parts that are coiled on themselves from the apex toward their base.
  • adj. Round or ring-shaped, particularly with distinct margins forming some sort of motive; annular.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Rolled together downward, the tip occupying the center; -- a term used in reference to foliation or leafing, as in ferns.
  • transitive v. To make a circle around; to encompass.

from The Century Dictionary and Cyclopedia

  • To make a circle (upon) with a pair of compasses.
  • Circular or ring-shaped: as, a circinate eruption: specifically, in botany, applied to that mode of vernation or foliation in which the leaf is rolled up on its axis from the apex toward the base, like a shepherd's crook, as in the fronds of ferns and the leaves of the sundew; but the term is also sometimes used when the coil simply forms a ring.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. shaped like a ring

Etymologies

Latin circinātus, past participle of circināre, to make circular, from circinus, pair of compasses; see Circinus.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin circinatus , past participle of circinō ("to make round") (Wiktionary)

Examples

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