thelarche.
The first stage of postnatal breast development, usually occurring at the beginning of puberty in girls, in which a firm, tender lump develops under the centre of the nipple.
Meaning & usage
The first stage of postnatal breast development, usually occurring at the beginning of puberty in girls, in which a firm, tender lump develops under the centre of the nipple.
The process of breast development or the period of such development.
Where this word comes from
From Ancient Greek θηλή (thēlḗ, “nipple”) + -arche. By surface analysis, thel- + -arche.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.