'Palpus' definitions:

Definition of 'Palpus'

From: GCIDE

Palpus \Pal"pus\, n.; pl. Palpi. [NL. See Palp.] (Zool.) A feeler; especially, one of the jointed sense organs attached to the mouth organs of insects, arachnids, crustaceans, and annelids; as, the mandibular palpi, maxillary palpi, and labial palpi. The palpi of male spiders serve as sexual organs. Called also palp. See Illust. of Arthrogastra and Orthoptera. [1913 Webster]