| fetal |
| 1. adj. (embryology) Pertaining to, or connected with, a fetus. | |
| fetal circulation | |
| fetal membranes | |
| membranes |
| 1. n. plural of membrane | |
| 2. n. (medicine, informal, specifically) The amniotic sac. | |
| membrane |
| 1. n. A flexible enclosing or separating tissue forming a plane or film and separating two environments (usually in a plant or animal). | |
| 2. n. A mechanical, thin, flat flexible part that can deform or vibrate when excited by an external force. | |
| 3. n. A flexible or semi-flexible covering or waterproofing whose primary function is to exclude water. | |
