- having the form of a discus or disk; flat and circular.
- Botany. (of a composite flower) consisting of a disk only, without rays.
- something in the form of a disk.
- Dentistry. an excavator with a disklike blade.
Origin of discoid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for discoid
The tumors appear as discoid prominences of varying size and number.
The radiate type is shown by discoid infusoria, by medusæ, by starfish and their allies.Form and Function
E. S. (Edward Stuart) Russell
Anterior above with a small, linear-oval, black, discoid spot.
Heads discoid, 15–many-flowered, in corymbose cymes; flowers perfect.
The tubular flowers compose the disk; and a head which has no ray-flowers is said to be discoid.
- like a disc
- (of a composite flower such as the tansy) consisting of disc florets only
- 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
- 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.