buccinator
noun [ C ] anatomy specialized uk/ˈbʌk.sɪ.neɪ.tər/ us/ˈbʌk.səˌneɪ.t̬ɚ/
颊肌
the flat, thin cheek muscle, inside the mouth at the side of the face
The buccinator helps to hold the cheek to the teeth during chewing. 颊肌用于在咀嚼时协助将面颊与牙齿的运动连在一起。