corpus luteum

noun

corpus lu·​te·​um -ˈlü-tē-əm How to pronounce corpus luteum (audio)
plural corpora lutea -ˈlü-tē-ə How to pronounce corpus luteum (audio)
: a yellowish mass of progesterone-secreting endocrine tissue that forms immediately after ovulation from the ruptured graafian follicle in the mammalian ovary
abbreviation CL

Example Sentences

Recent Examples on the Web Shortly after, that follicle develops a corpus luteum, which secretes hormones needed early in pregnancy. Kaitlin Sullivan, NBC News, 26 Sep. 2022 Then there are corpus luteum cysts, which happen when fluid starts building up inside a follicle that's already done its due diligence and released an egg. Korin Miller, SELF, 18 Aug. 2020 Doctors put most ovarian cysts into two categories: follicular cysts and corpus luteum cysts. Korin Miller, SELF, 9 Oct. 2019 The two main types of ovarian cysts are follicle cysts and corpus luteum cysts, according to the Office on Women's Health (OWH). Christina Oehler, Health.com, 28 Aug. 2019 Once the egg is released, the empty follicle shrinks to form what's called a corpus luteum, which is supposed to make hormones to get ready for the next egg. Carolyn L. Todd, SELF, 28 Jan. 2019 The two most common types, follicular cysts and corpus luteum cysts, occur when something goes a little awry during a regular menstrual cycle, the Mayo Clinic explains. Carolyn L. Todd, SELF, 28 Jan. 2019 After the follicle releases the egg, the follicle shrinks into a mass called the corpus luteum. Zahra Barnes, SELF, 23 Feb. 2018 After an egg has been released from an ovary, the ovarian follicle collapses to temporarily form the corpus luteum, which produces progesterone, the Mayo Clinic explains. Korin Miller, SELF, 28 Feb. 2018 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'corpus luteum.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

Etymology

borrowed from New Latin corpus lūteum "yellow body"

First Known Use

1788, in the meaning defined above

Time Traveler
The first known use of corpus luteum was in 1788

Dictionary Entries Near corpus luteum

Cite this Entry

“Corpus luteum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/corpus%20luteum. Accessed 9 Dec. 2022.

Kids Definition

corpus luteum

noun
cor·​pus lu·​te·​um
ˌkȯr-pəs-ˈlüt-ē-əm
plural corpora lutea
ˌkȯr-p(ə-)rə-ˈlüt-ē-ə
: a yellowish mass of tissue formed in a graafian follicle in the ovary of a mammal after the egg is released

Medical Definition

corpus luteum

noun
corpus lu·​te·​um -ˈlüt-ē-əm, -lü-ˈtē-əm How to pronounce corpus luteum (audio)
plural corpora lutea -ə How to pronounce corpus luteum (audio)
: a yellowish mass of progesterone-secreting endocrine tissue that consists of pale secretory cells derived from granulosa cells, that forms immediately after ovulation from the ruptured graafian follicle in the mammalian ovary, and that regresses rather quickly if the ovum is not fertilized but persists throughout the ensuing pregnancy if it is fertilized

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