dis·​coid ˈdi-ˌskȯid How to pronounce discoid (audio)
: relating to or having a disk: such as
: situated in the floral disk
discoid florets
: having only disk flowers
a discoid flower head
: flat and circular like a disc

Examples of discoid in a Sentence

Recent Examples on the Web Some target the hair follicles or scalp specifically—like alopecia areata and discoid lupus erythematosus—while others (such as thyroid disease) affect another part of the body and can cause hair loss as one of many symptoms, Dr. Lo Sicco explains. Krissy Brady, SELF, 5 Mar. 2024 The reasons for this discrepancy aren’t clear, but the answer could be tied to other discoid eczema risk factors. Stephanie Watson, SELF, 8 Apr. 2022 Dermatologists sometimes refer to this eczema type as discoid eczema, another reference to its signature circular marks. Stephanie Watson, SELF, 8 Apr. 2022 Opah are discoid fish, meaning they are shaped like large discs. oregonlive, 15 July 2021 This type of eczema—often called nummular eczema or discoid eczema—happens after some kind of skin injury (like a bug bite, burn, or cut), SELF previously reported. Korin Miller, SELF, 6 Oct. 2020 It can also be used to treat discoid lupus erythematosus and systemic lupus erythematosus. Adrianna Rodriguez, USA TODAY, 22 May 2020 In addition to malaria, the drug can also be used to treat acute and chronic rheumatoid arthritis, discoid lupus erythematosus and systemic lupus erythematosus. Elizabeth Weise, USA TODAY, 19 May 2020 When 23-year-old Jokiva Bellard was diagnosed with discoid lupus five years ago, she was devastated. Hayley MacMillen, Allure, 23 Jan. 2018

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'discoid.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


borrowed from New Latin discoīdēs, borrowed from Greek diskoeidḗs "shaped like a discus," from dískos discus + -oeidēs -oid entry 2

First Known Use

1712, in the meaning defined at sense 1

Time Traveler
The first known use of discoid was in 1712

Dictionary Entries Near discoid

Cite this Entry

“Discoid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/discoid. Accessed 15 Apr. 2024.

Medical Definition


1 of 2 adjective
dis·​coid ˈdis-ˌkȯid How to pronounce discoid (audio)
: resembling a disk : being flat and circular
the red blood cell is a biconcave discoid body
: characterized by macules
discoid lupus erythematosus


2 of 2 noun
: an instrument with a disk-shaped blade used in dentistry for carving

More from Merriam-Webster on discoid

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!