Lemma (from Ancient Greek λῆμμα premise, assumption, from Greek λαμβάνω I take, I get) may refer to:

Look up Lemma or lemma in Wiktionary, the free dictionary.

• Lemma (morphology), the canonical, dictionary or citation form of a word
• Lemma (psycholinguistics), a mental abstraction of a word about to be uttered

• Lemma (botany), a part of a grass plant
• Lemma (mathematics), a proven proposition used as a step in a larger proof

• Lemma (album), by John Zorn (2013)
• Lemma (logic), an informal contention

• Analemma, a diagram showing the variation of the position of the Sun in the sky
• Dilemma
• Lema (disambiguation)
• Lemmatisation
• Neurolemma, part of a neuron

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