See b. (muscle).
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buc·ci·na·tor 'bək-sə-.nāt-ər n a thin broad muscle forming the wall of the cheek and serving to compress the cheek against the teeth and to retract the angle of the mouth called also buccinator muscle
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n.
a muscle of the cheek that has its origin in the maxilla and mandible (jaw bones). It is responsible for compressing the cheek and is important in mastication.
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buc·ci·na·tor (bukґsĭ-na″tər) [L. “trumpeterâ€] see under musculus.Medical dictionary. 2011.