Definitions

1. noun

a pair of hair-like appendages or organs, especially on certain animals such as insects and crustaceans

“The cirri on the crayfish helped it sense its surroundings.”

2. noun

a long, thin, hair-like structure, especially on certain plants such as ferns

“The cirri on the fern added to its aesthetic appeal.”

3. noun

a hair-like appendage on the head of a fly, often mistaken for an antennae

“The cirri on the fly were very visible and easily seen.”

4. noun

a hair-like appendage on the head of an oar worm

“The cirri on the oar worm were used for sensory purposes.”