lower jaw
Học thuậtThân thiện
Definition
Noun: - The movable bone structure forming the lower part of the human or vertebrate skull, hinged at the sides to allow the mouth to open and close. It is the part of the jaw that holds the lower teeth.
Usage
The term "lower jaw" is used to specifically describe the anatomical structure. It is a common, clear term used in both everyday and scientific contexts. - In anatomy and medicine, it is precisely called the mandible. - In everyday language, it is often simply called the "jaw" when the context is clear, though "jaw" can refer to both the upper and lower structures.
Examples
- The dentist took an X-ray of my lower jaw to check the wisdom tooth.
- In the fossil, the lower jaw was remarkably well-preserved.
- He felt a sharp pain in his lower jaw when he tried to chew.
Advanced Usage
- "lower jawbone": A more formal or explicit synonym for "lower jaw," emphasizing its bony structure.
- The impact fractured his lower jawbone.
Variants and Related Words
- Mandible (noun): The formal anatomical and zoological term for the lower jaw or jawbone.
- Jaw (noun): A more general term that can refer to the entire structure (both upper and lower) or, informally, just the lower jaw.
- Mandibular (adjective): Relating to the lower jaw (e.g., mandibular nerve).
Synonyms
- Mandible
- Jawbone (when context specifies the lower one)
- Lower jawbone
Notes on Meaning
- The "lower jaw" is distinct from the upper jaw (maxilla), which is fixed to the skull.
- Its primary functions include biting, chewing, and speech.
Noun
- the jaw in vertebrates that is hinged to open the mouth