lemma

• 一个多义名词：在逻辑学和数学中，指用于证明其他命题的辅助命题；在植物学中，指包裹禾本科植物小花的两个鳞片中的下方那一个；在词典学中，指词条或注释的标题词。

A noun with multiple meanings: in logic and mathematics, it refers to a subsidiary proposition used to prove another; in botany, it is the lower of the two glumes enclosing a grass floret; and in lexicography, it denotes the headword or subject of a dictionary entry or annotation.

1. Auxiliary propositionC1formalscientific

   A statement that is taken as true to help prove a larger or more important statement.

   引理

   • The mathematician proved a lemma before tackling the main theorem.
   • This lemma is essential for understanding the subsequent proof.
   • The textbook presented several lemmas to support the final argument.

   同义词assumptionpostulatepremisesupposition

2. Botanical structureC2formalscientific

   The lower and thicker of the two bracts that surround the floret in grasses.

   植物结构

   • The lemma of the wheat plant is crucial for seed development.
   • Botanists examined the lemma to classify the grass species.
   • The lemma and palea together protect the floret.

3. Dictionary entry headingB2formal

   The word or phrase that is being defined or explained in a dictionary, glossary, or annotation.

   词目

   • The lemma 'run' has many definitions in the dictionary.
   • Each lemma in the glossary is followed by a brief explanation.
   • The editor carefully chose the lemmas for the new dictionary.

   同义词citation formhead