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Webster 1913 Edition

Lemma

Lem′ma

(lĕm′mȧ)
,
Noun.
;
pl. L.
Lemmata
(-mȧ-tȧ)
, E.
Lemmas
(-mȧz)
.
[L.
lemma
, Gr.
λῆμμα
anything received, an assumption or premise taken for granted, fr.
λαμβάνειν
to take, assume. Cf.
Syllable
.]
1.
(Math., Logic)
A preliminary or auxiliary proposition demonstrated or accepted for immediate use in the demonstration of some other proposition, as in mathematics or logic.

Webster 1828 Edition

Lemma

LEM'MA

,
Noun.
[Gr. from to receive.]
In mathematics, a previous proposition proved, or a proposition demonstrated for the purpose of being used in the demonstration of some other proposition. It is therefore a received truth.

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