amnios
Definition
Noun: 1. The innermost fetal membrane: A thin, protective sac that surrounds and contains the developing embryo or fetus of reptiles, birds, and mammals. It is filled with amniotic fluid.
Usage
The word "amnios" is a technical, scientific term used primarily in embryology, zoology, and medicine. It refers specifically to the anatomical structure. - The amnios provides a buoyant, protective environment for the embryo. - A sample of fluid from the amnios can be used for genetic testing.
Advanced Usage
- "Amnios" vs. "Amnion": "Amnios" is a less common singular form. The more standard singular term is "amnion." The plural form is "amnia."
- The integrity of the amnion is crucial for fetal development.
Variants and Related Words
- Amnion (n): The standard singular form for the amniotic sac.
- Amniotic (adj): Relating to the amnion or amniotic fluid.
- Amniotic fluid
- Amniote (n): A vertebrate animal (reptile, bird, or mammal) that possesses an amnion during embryonic development.
- Amniocentesis (n): A medical procedure involving the extraction of amniotic fluid for diagnostic purposes.
Synonyms
- Amniotic sac
- Bag of waters (informal, clinical)
Notes on Meaning
This term has a single, precise anatomical meaning. It is not used in idiomatic or figurative language.
Noun
-
thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals)
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