The Collaborative International Dictionary of English v.0.48:

Palp \Palp\ (p[a^]lp), n. [Cf. F. palpe. See Palpable.]
   (Zool.)
   Same as Palpus.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Palp \Palp\, v. t. [L. palpare: cf. F. palper.]
   To have a distinct touch or feeling of; to feel. [Obs.]
   [1913 Webster]

         To bring a palp[`e]d darkness o'er the earth.
                                                  --Heywood.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

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]