cyst

1 of 3

noun

1
: a closed sac having a distinct membrane and developing abnormally in a cavity or structure of the body
2
: a body resembling a cyst: such as
a
: a resting spore of many algae
b
: the air bladder of certain algae or aquatic plants (such as rockweed)
c
: a capsule formed about a minute organism going into a resting or spore stage
also : this capsule with its contents
d
: a resistant cover about a parasite produced by the parasite or the host

cyst-

2 of 3

combining form

variants or cysti- or cysto-
: bladder
cystitis
: sac
cystocarp

-cyst

3 of 3

noun combining form

: bladder : sac
blastocyst

Examples of cyst in a Sentence

Recent Examples on the Web
Noun
How to treat epidermoid cysts: Dr. Jaliman uses a cortisone shot to shrink the cyst under the skin. Daley Quinn, Women's Health, 8 Sep. 2023 This syndrome, or collection of associated symptoms, affects hormone production and metabolism, causing irregular menstrual periods, hair loss, ovarian cysts, and fertility challenges. Lindsay Modglin, Health, 1 Sep. 2023 Stephanie was diagnosed with a pituitary cyst after the couple married in 2017, according to the hospital. Brian Brant, Peoplemag, 29 Aug. 2023 Cystic acne: The most severe form of acne vulgaris, this type can occur anywhere on the face or body and consists of inflammation and large, painful blemishes (or cysts). Angela Palmer Updated, Verywell Health, 5 July 2023 Ovarian cysts Ovarian cysts can form and grow larger during pregnancy,3 which might result in pelvic pain—partly because your growing uterus puts pressure on your ovaries. Rebecca Stewart, Parents, 6 Sep. 2023 There were also multiple perineural cysts at L3-4 and S2. Dr. Keith Roach, oregonlive, 1 Sep. 2023 Though surgeons were able to remove the cyst, the couple still struggled to get pregnant. Brian Brant, Peoplemag, 29 Aug. 2023 Isotretinoin treats severe acne, such as cysts and nodules that are often large and painful. Madeleine Burry, Health, 19 Aug. 2023 See More

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

Word History

Etymology

Noun

New Latin cystis, from Greek kystis bladder, pouch; akin to Sanskrit śvasiti he blows, snorts — more at wheeze

Combining form

French, from Greek kyst-, kysto-, from kystis

Noun combining form

New Latin -cystis, from Greek kystis

First Known Use

Noun

circa 1723, in the meaning defined at sense 1

Time Traveler
The first known use of cyst was circa 1723

Dictionary Entries Near cyst

Cite this Entry

“Cyst.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cyst. Accessed 25 Sep. 2023.

Kids Definition

cyst

noun
1
: a closed pouch or sac of fluid or solid material that develops in the body in some diseased conditions
2
: a covering resembling a cyst or a body (as a spore) with such a covering
cystic
ˈsis-tik
adjective

Medical Definition

cyst

noun
1
: a closed sac having a distinct membrane and developing abnormally in a body cavity or structure
2
: a body resembling a cyst: as
a
: a capsule formed about a minute organism going into a resting or spore stage
also : this capsule with its contents
b
: a resistant cover about a parasite produced by the parasite or the host compare hydatid sense 2a
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!