1. 上腭,上膛：thermocouple pyrometer 热电偶高温计 | roof of the mouth 上腭,上膛 | gum rubber tubing 纯胶管 软管

2. 口腔顶：roof garden 屋顶花园 | roof of the mouth 口腔顶 | roof over one's head 有栖身之处

noun

1. the upper surface of the mouth that separates the oral and nasal cavities

Synonym: palate