Ptilopaedes

New Latin; from Ancient Greek πτίλον (ptílon, “down”) +‎ Ancient Greek παῖδες (paîdes, “children”).

• (Classical Latin) IPA^(key): [ptɪ.ɫɔˈpae̯.deːs]
• (modern Italianate Ecclesiastical) IPA^(key): [pt̪i.loˈpɛː.d̪es]

Ptilopaedēs m pl (genitive *Ptilopaedum or *Ptilopaedium); third declension

1. (New Latin, ornithology, rare, collectively) All those birds that have a complete covering of down when they hatch; all ptilopaedic birds.
   • For quotations using this term, see Citations:Ptilopaedes.

Third-declension noun, plural only.

• (antonym(s) of “birds covered in down upon hatching”): Psilopaedēs