praecocial definitions Oxford Reference Dictionary adj. & n. (US precocial) --adj. (of ... feed themselves as soon as they are hatched. --n. a praecocial bird (cf. ALTRICIAL). Etymology: L praecox -cocis (as PRECOCIOUS) Webster's 1913 Dictionary Praecocial Pr[ae]*co"cial, a. (Zo["o]l.) Of or ...