clavi-, clav-

(Latin: knotty stick, club)

The club-shaped end of the antenna in certain insects.
clavate, claval
Club-shaped; gradually thickening at one end.
clavicorn (adjective)
Having club-shaped antennae
claviform (adjective)
Related to something that is shaped like a club with the end that is away from the handle being thicker.
claviformed (adjective)
Being club-shaped and is thicker at one end.
The flagellar portion, or terminal joints, of insect antenna.