Source : Webster's Revised Unabridged Dictionary (1913)

Paxillus \Pax*il"lus\, n.; pl. {Paxilli}. [L., a peg.]
   (Zo["o]l.)
   One of a peculiar kind of spines covering the surface of
   certain starfishes. They are pillarlike, with a flattened
   summit which is covered with minute spinules or granules. See
   Illustration in Appendix.