Amnion
6 lettersnounmoderateUpdated June 2026
Definition
The thin innermost membrane forming a fluid-filled sac that encloses and protects the developing embryo of reptiles, birds, and mammals.
“The amnion ruptured naturally at the onset of labour.”
Pronunciation
Syllables
am·ni·on
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Synonyms
Word Game Tips
Wordle
Contains A, I, O, three vowels. Ends in -ION, one of the most common English suffixes. A great early guess.
Scrabble
Worth 8 points. The -ION ending hooks well onto the board. A useful biology term to keep memorised.
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