English Dictionary

alderfly

/ˈɔːl.də.flaɪ/

noun

A member of any one of the sixty-six species of the family Sialidae of megalopteran insects, each specimen of which has a body length not exceeding one inch and possesses long filamentous antennae and four large dark wings.

The alderfly is a type of aquatic insect.

意味（1）

A member of any one of the sixty-six species of the family Sialidae of megalopteran insects, each specimen of which has a body length not exceeding one inch and possesses long filamentous antennae and four large dark wings.

意味（2）

(fishing) An artificial fly with brown mottled wings, body of peacock harl, and black legs.