1. [ noun ] (botany,anatomy,zoology,embryology) any membrane that functions for the protection or nourishment of respiration or excretion of a developing fetus
Related terms: membrane caul allantois umbilical_cord chorion amnion
2. [ noun ] (botany,anatomy,zoology,embryology) the inner embryonic membrane of higher vertebrates (especially when covering the head at birth)
Synonyms: veil embryonic_membrane caul
Related terms: membrane placenta fetus
Similar spelling:   fetal_movement