See more synonyms for discoid on Thesaurus.com
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.
  1. something in the form of a disk.
  2. Dentistry. an excavator with a disklike blade.

Origin of discoid

1785–95; < Late Latin discoīdēs < Greek diskoeidḗs quoit-shaped. See discus, -oid
Related formspost·dis·coi·dal, adjectivesub·dis·coid, adjectivesub·dis·coi·dal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for discoid


adjective Also: discoidal (dɪsˈkɔɪdəl)
  1. like a disc
  2. (of a composite flower such as the tansy) consisting of disc florets only
  1. a disclike object
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

discoid in Medicine


  1. 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.