discoid

adjective

dis·​coid ˈdi-ˌskȯid 

1

: relating to or having a disk: such as

a

: situated in the floral disk

discoid florets

b

: having only disk flowers

a discoid flower head

2

: flat and circular like a disc

Examples of discoid in a Sentence

Recent Examples on the Web

The main difference between my form of lupus and other variations of the disease is that discoid lupus is cutaneous, or limited to the skin. —Amanda Mitchell, Allure, 5 Nov. 2025

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

Opah are discoid fish, meaning they are shaped like large discs. —oregonlive, 15 July 2021

It can also be used to treat discoid lupus erythematosus and systemic lupus erythematosus. —Adrianna Rodriguez, USA TODAY, 22 May 2020

Word History

Etymology

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

Medical Definition

discoid

1 of 2 adjective

dis·​coid ˈdis-ˌkȯid 

1

: resembling a disk : being flat and circular

the red blood cell is a biconcave discoid body

2

: characterized by macules

discoid lupus erythematosus

discoid

2 of 2 noun

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