Definitions

1. noun

any of various aquatic insects of the order Trichoptera, especially those of the family Trichoceridae, that are used in fishing and are often found near waterfalls or rapids.

“The angler spent hours trying to catch a caddisfly near the river.”

2. verb

to fish using an artificial fly that imitates a caddisfly.

“He went caddisfly fishing in the mountain stream.”