asternal
/əs'tə:nəl/
Definition
- Adjective:
- Not connected to the sternum or breastbone: In anatomy, this term describes a structure, typically a rib, that is not attached to the sternum.
- Lacking a sternum: In zoology, it can describe an organism or anatomical structure that does not possess a sternum.
Usage Examples
- Adjective:
- In humans, the last two pairs of ribs are asternal ribs, also known as floating ribs.
- The biologist noted that the specimen was asternal, which was unusual for its class.
Advanced Usage
- Technical/Anatomical Context: The term is almost exclusively used in specialized scientific fields like human anatomy, comparative anatomy, and zoology.
- The asternal condition of the ribs allows for greater flexibility in the lower thoracic region.
Variants and Related Words
- Sternal (adj): Of or relating to the sternum. (This is the direct antonym).
- Asternia (n): A congenital absence of the sternum.
Synonyms
- Non-sternal: Not of or relating to the sternum.
- Unattached to the sternum: A descriptive phrase with the same meaning in an anatomical context.
Antonyms
- Sternal: Connected to or associated with the sternum.
Adjective
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not connected to the sternum or breastbone
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asternal ribs
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