WordWeight : Weighing the Words

Pronunciation : Fe"tus
Part of Speech : n.;
Etymology : [L. fetus, foetus, a bringing forth, brood, offspring, young ones, cf. fetus fruitful, fructified, that is or was filled with young; akin to E. fawn a deer, fecundity, felicity, feminine, female, and prob. to do, or according to others, to be.]
Definition : Defn: The young or embryo of an animal in the womb, or in the egg; often restricted to the later stages in the development of viviparous and oviparous animals, embryo being applied to the earlier stages. [Written also foetus.]

pl. Fetuses.
Source : Webster's Unabridged Dictionary, 1913