The Collaborative International Dictionary
Ptilopaedic
Ptilopaedic \Ptil`o*p[ae]d"ic\, a. (Zo["o]l.) Having nearly the whole surface of the skin covered with down; dasyp[ae]dic; -- said of the young of certain birds.
Wiktionary
ptilopaedic
a. (context zoology English) Having nearly the whole surface of the skin covered with down, like the young of certain birds.