discoidal

dis·coid

[dis-koid]
adjective Also, dis·coi·dal.
1.
having the form of a discus or disk; flat and circular.
2.
Botany. (of a composite flower) consisting of a disk only, without rays.
noun
3.
something in the form of a disk.
4.
Dentistry. an excavator with a disklike blade.

Origin:
1785–95; < Late Latin discoīdēs < Greek diskoeidḗs quoit-shaped. See discus, -oid

post·dis·coi·dal, adjective
sub·dis·coid, adjective
sub·dis·coi·dal, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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00:10
Discoidal is always a great word to know.
So is quincunx. Does it mean:
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
Collins
World English Dictionary
discoid (ˈdɪskɔɪd) [Click for IPA pronunciation guide]
 
adj
1.  like a disc
2.  (of a composite flower such as the tansy) consisting of disc florets only
 
n
3.  a disclike object

Collins English Dictionary - Complete & Unabridged 10th Edition
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Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Medical Dictionary

discoid dis·coid (dĭs'koid') or dis·coi·dal (dĭ-skoid'l)
adj.
Shaped like or resembling a disk.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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