foetus

As nouns the difference between foetus and faetus

is that foetus is an alternative spelling of lang=en while faetus is obsolete spelling of lang=en.

As nouns the difference between taxonomy and foetus

is that taxonomy is the science or the technique used to make a classification while foetus is (chiefly|british|hypercorrect).

As nouns the difference between zygote and foetus

is that zygote is a fertilized egg cell while foetus is an alternative spelling of lang=en.

As nouns the difference between foetus and gastroelytrotomy

is that foetus is (chiefly|british|hypercorrect) while gastroelytrotomy is (surgery) the operation of cutting into the upper part of the vagina, through the abdomen (without opening the peritoneum), for the purpose of removing a foetus.

As nouns the difference between foetus and oligohydramnios

is that foetus is (chiefly|british|hypercorrect) while oligohydramnios is (medicine) a deficit of amniotic fluid in the amniotic sac, causing distinctive deformations of the foetus.

As nouns the difference between foetus and lithopedion

is that foetus is (chiefly|british|hypercorrect) while lithopedion is (medical) a calcium-encased foetus that occurs in ectopic abdominal pregnancies when the foetus dies and is not reabsorbed by the maternal body, whereby the maternal system encases the foreign body (foetus) in calcium to isolate it.