D defs.my
Entry 2 senses Webster, 1913

Lemma

/(lĕm"mȧ)/ · Lem·ma · IPA /ˈlɛmə/
01 n. A preliminary or auxiliary proposition demonstrated or accepted for immediate use in the demonstration of some other proposition, as in mat…
pl. Lemmata, Lemmas ((-mȧ*tȧ))
  1. 1.
    A preliminary or auxiliary proposition demonstrated or accepted for immediate use in the demonstration of some other proposition, as in mathematics or logic.(Math., Logic)
  2. 2.
    A word that is included in a glossary or list of headwords; a headword.