palpus
n.,
pl. pal$pi# 73pj#8 5ModL < L palpus, the soft palm of the hand, akin to palpare: see PALPABLE6
1 a jointed organ or feeler for touching or tasting, attached to one of the head appendages of insects, lobsters, etc.
2 a fleshy, sensory structure in the oral region of some polychaete worms