What does "chorion" mean?
The protective and nutritive membrane in higher vertebrates that attaches the fetus to the uterus.
Chorion
/ˈkɔɹiɑn/ noun
noun ·Rare ·Advanced level
Meaning at a glance
- Primary sense: The protective and nutritive membrane in higher vertebrates that attaches the fetus to the uterus.
- Grammar: chorion is listed as noun.
- Useful contrasts: amnion.
- Usage evidence: 2002, Rovert E. A. Stewart, Barbara E. Stewart, Female Reproductive Systems, entry in Encyclopedia of Marine Mammals, page 425, The allantois fuses with the chorion, forming a small round area, the allentochorion. This region becomes the placenta (Fig. 3).
How to use "chorion"
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- Compare nearby synonyms to make sure "chorion" carries the exact meaning, tone, and strength you need.
- Use the example sentence as a context check. If your sentence uses the word differently, confirm that the grammar still fits.
Meaning check
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- Does it match the intended tone rather than only the dictionary definition?
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- Is there enough surrounding context to prevent ambiguity?
Source and review context
This entry combines structured lexical data with WordToolSet review checks. Definitions, examples, synonyms, and usage notes may come from different source tables, so the page is designed to show evidence from more than one angle before you rely on "chorion" in a final draft.
If a word has several senses, prefer the sense that matches your sentence's grammar and surrounding context. A correct definition can still be the wrong choice when the sentence needs a different register, emphasis, or level of specificity.
Before you rely on this definition
Read the first definition as a starting point, then check the example, synonyms, and part of speech before treating "chorion" as the right word for your sentence.
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Compare nearby meanings
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Definition decision workflow
1. Identify the role
Check whether "chorion" is acting as noun in your sentence. A definition is only useful when the grammar matches the way the word is being used.
2. Test the nearest option
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3. Confirm with context
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Final meaning check
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When the definition, synonym evidence, and example context point in the same direction, the word is usually a safer choice. When they conflict, revise the sentence or choose a clearer alternative.
Definitions
Noun
- 1 The protective and nutritive membrane in higher vertebrates that attaches the fetus to the uterus.
"2002, Rovert E. A. Stewart, Barbara E. Stewart, Female Reproductive Systems, entry in Encyclopedia of Marine Mammals, page 425, The allantois fuses with the chorion, forming a small round area, the allentochorion. This region becomes the placenta (Fig. 3)."
- 2 the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals) wordnet
- 3 The outer case of an insect egg.
"The chorion has a predominantly lamellar structure, the lamellae being two-dimensional networks of protein fibrils."
- 4 The outer membrane of seeds of plants.
Antonyms
Example
"2002, Rovert E. A. Stewart, Barbara E. Stewart, Female Reproductive Systems, entry in Encyclopedia of Marine Mammals, page 425, The allantois fuses with the chorion, forming a small round area, the allentochorion. This region becomes the placenta (Fig. 3)."
Common questions
How do you use "chorion" in a sentence?
2002, Rovert E. A. Stewart, Barbara E. Stewart, Female Reproductive Systems, entry in Encyclopedia of Marine Mammals, page 425, The allantois fuses with the chorion, forming a small round area, the allentochorion. This region becomes the placenta (Fig. 3).
How do you pronounce "chorion"?
Pronounced /ˈkɔɹiɑn/.
Etymology
From Late Latin chorion, from Ancient Greek χόριον (khórion, “membrane surrounding the fetus, afterbirth”).