Source : Webster's Revised Unabridged Dictionary (1913)

Psilopaedes \Psi`lo*p[ae]"des\, n. pl. [NL., from Gr.? bare + ?,
   ?, offspring.] (Zo["o]l.)
   birds whose young at first have down on the pteryl[ae] only;
   -- called also {Gymnop[ae]des}.