| fetus | <biology, embryology, obstetrics> A developing unborn offspring of an animal that gives birth to its young (as opposed to laying eggs). From approximately three months after conception the offspring take on a recognisable form (all parts in place, etc.). In human development, the period after the seventh or eighth week of pregnancy is the foetal period. (12 Nov 1997) |
|---|---|
| foetus papyraceus | One of twin foetus's that has died and been pressed flat against the uterine wall by the growth of the living foetus. (05 Mar 2000) |