upper jaw
Definition
Noun: - The upper jaw in vertebrates that is fused to the cranium: This is the bony structure that forms the upper part of the mouth and holds the upper teeth. It is anatomically fixed to the skull.
Usage
The term "upper jaw" is used to specifically describe the anatomical part, distinguishing it from the movable lower jaw (mandible). It is a standard term in biology, medicine, and dentistry.
Examples
- Noun:
- The impact of the fall fractured his upper jaw.
- In humans, the upper jaw is formed by the maxilla and premaxilla bones.
Advanced Usage
- "Upper jaw" is often used in comparative anatomy to discuss differences among species.
- The dinosaur's fossil showed a remarkably long upper jaw.
Variants and Related Words
- Maxilla (n): The primary bone forming the upper jaw. This is the more precise anatomical term.
- The surgeon operated on the patient's fractured maxilla.
- Upper jawbone: A less common, descriptive synonym.
Synonyms
- Maxilla: The principal bone of the upper jaw.
- Superior maxillary bone: A formal, technical synonym.
Antonyms
- Lower jaw: The movable jawbone (mandible).
- Mandible: The anatomical term for the lower jaw.
Noun
-
the jaw in vertebrates that is fused to the cranium
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