1. The young of viviparous animals in the womb, and of oviparous animals in the egg, from the time the parts are distinctly formed.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• fetta,
• fhtis,
• fetures,
• feutus,
• fosus,
• fets,
• futue,
• etuos,
• featur,
• featus,
• fethis,
• feums,
• futurs,
• fiturs,
• ferous,
• lettus,
• featurs,
• fuetur,
• featues,
• fefuse

• fits,
• fettes,
• foetus,
• fetish,
• feuds,
• fettig,
• feeds.

The adjective form of the word "fetus" is "fetal".

The plural of the "fetus" can be the "fetuses".

The singular of the "fetus" can be the "fetus".