1. Accessory bone; Accessory muscle; Accessory nucleus, in anatomy, a cranial nerve nucleus; Accessory nerve; In arts and entertainment

2. A case of an anomalous unilateral accessory muscle lying on the ramus of the mandible medial to M. depressor labii mandibularis in a female fallow deer and another case of anomalous unilateral accessory small muscle connecting the aboral portion of M. malaris and fascia parotidea in a female red deer were observed during the course of dissection of the heads of both species.