also: じょうがく
noun
upper jaw; palate
Refers to the upper part of the jaw, including the hard palate. Used in both everyday and medical contexts.
転んで上顎を強く打った。
I fell and hit my upper jaw hard.
歯科医が上顎のレントゲンを撮った。
The dentist took an X-ray of my upper jaw.
Mixed kana spelling that makes the reading clear; common in everyday writing.
Compound of 上 (うわ, 'upper') and 顎 (あご, 'jaw'). The reading じょうがく is the on'yomi version used in technical terminology.