like an orb; circular; ringlike; spherical; rounded.

1375–1425; late Middle English < Late Latin orbiculāris circular, equivalent to Latin orbicul(us) small disk (orbi(s) orb + -culus -cule1) + -āris -ar1

orbicularity, orbicularness, noun
orbicularly, adverb
suborbicular, adjective
suborbicularly, adverb
suborbicularity, noun
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
orbicular, orbiculate or orbiculated (ɔːˈbɪkjʊlə)
1.  circular or spherical
2.  (of a leaf or similar flat part) circular or nearly circular
3.  rare rounded or total
orbiculate, orbiculate or orbiculated
orbiculated, orbiculate or orbiculated
orbicularity, orbiculate or orbiculated
or'bicularly, orbiculate or orbiculated

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

orbicular or·bic·u·lar (ôr-bĭk'yə-lər)

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
The costa is also pale, and linked to the top of the pale reniform and orbicular spots.
Floating leaves are orbicular to oval in shape, with heart shaped bases and rounded to notched tips.
The lower leaves are orbicular or ovate-deltoid in shape, becoming progressively smaller towards the tip of the stem.
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