La`bi·pal'pus noun ; plural Labipalpi [ New Latin See Labium , and Palpus .] (Zoology) One of the labial palpi of an insect. See Illust. under Labium . 
• (n.) One of the labial palpi of an insect. See Illust. under Labium.
labipalpus One of the labial (surface next to lips) palpi or a feeler; especially, one of the jointed sense organs attached to the mouth organs of insects.