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Definition of Labellum
1. n. The lower or apparently anterior petal of an orchidaceous flower, often of a very curious shape.
Definition of Labellum
1. Noun. The lower central petal of orchid flowers, usually developed to be showy and attract pollinators. ¹
¹ Source: wiktionary.com
Definition of Labellum
1. the lower petal of an orchid [n -LA]
Medical Definition of Labellum
1. A lip, in orchids, the distinctive median petal that serves as an alighting platform for pollinating insects. (09 Oct 1997)