discoid

[dis-koid]

See more synonyms for discoid on Thesaurus.com

adjective Also dis·coi·dal.

having the form of a discus or disk; flat and circular.
Botany. (of a composite flower) consisting of a disk only, without rays.

noun

something in the form of a disk.
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

Examples from the Web for discoid

Historical Examples

The tumors appear as discoid prominences of varying size and number.
A System of Practical Medicine By American Authors, Vol. II
Various
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.
Zoological Illustrations, or Original Figures and Descriptions. Volume II, Second Series
William Swainson
Heads discoid, 15–many-flowered, in corymbose cymes; flowers perfect.
The Manual of the Botany of the Northern United States
Asa Gray
The tubular flowers compose the disk; and a head which has no ray-flowers is said to be discoid.
The Manual of the Botany of the Northern United States
Asa Gray

British Dictionary definitions for discoid

discoid

adjective Also: discoidal (dɪsˈkɔɪdəl)

like a disc
(of a composite flower such as the tansy) consisting of disc florets only

noun

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

discoid

(dĭs′koid′)

adj.

Shaped like or resembling a disk.

discoid

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Examples from the Web for discoid

Historical Examples

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.

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.

discoid

discoid

Origin of discoid