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amnion
This term is a specialized biological descriptor used primarily in embryology and anatomy. It carries a clinical and descriptive tone, evoking the image of a protective, fluid-filled sac that isolates a developing organism from external pressure. It is almost exclusively used in scientific, medical, or academic discourse rather than in casual conversation.
As a technical noun, it follows standard English countability rules, though it is frequently encountered in the singular when referring to the general biological structure. In comparative anatomy, the plural form is used to discuss the membranes of multiple specimens or different species.
Meanings
Examples
The amnion is a thin membrane that surrounds the embryo.
Does the amnion rupture before the baby is born?
The fluid within the amnion allows the fetus to move freely.
I wonder how the amnion manages to maintain a constant temperature.
The amnion provides a sterile environment for the developing organism.
The amnion provides a sterile environment for the developing organism.
A tear in the amnion can lead to premature leakage of fluid.
The professor explained that the amnion is a key feature of amniotes.
The amnion acts as a shock absorber to protect the embryo from impact.