: the process of female gamete formation including formation of an oocyte from an oogonium (see oogonium sense 2) followed by meiotic division

Examples of oogenesis in a Sentence

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Instead, the theropods from the oogenesis, Himeoolithus and Macroelongatoolithus, laid the smallest and largest dinosaur eggs ever discovered, which are around 2 and 24 inches in length. Sam Walters, Discover Magazine, 21 Mar. 2023 First, females must be able to create egg cells (oogenesis) without stimulation from sperm or mating. Mercedes Burns, CNN, 27 Dec. 2021

Word History

Etymology

New Latin

First Known Use

circa 1879, in the meaning defined above

Time Traveler
The first known use of oogenesis was circa 1879

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Cite this Entry

“Oogenesis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/oogenesis. Accessed 8 Jul. 2026.

Kids Definition

oogenesis

noun
: the process of female gamete formation including meiosis and formation of eggs

Medical Definition

oogenesis

noun
: formation and maturation of the egg

called also ovogenesis

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