唇しん弁べん

noun

labellum; lip (of an orchid flower)

Botanical term for the specialized petal of an orchid or similar flower, often used for attracting pollinators.

• このランの唇しん弁べんは鮮あざやかな紫むらさき色いろをしている。

  The labellum of this orchid is a vivid purple.

noun

velum (of a mollusc or medusa)

Zoological term for a membrane or lip-like structure in certain invertebrates, such as the velum of a mollusc larva or the marginal structure of a jellyfish.

• 軟なん体たい動どう物ぶつの幼よう生せいは唇しん弁べんを使つかって遊ゆう泳えいする。

  Mollusc larvae swim using the velum.