1. A smoothly grooved instrument used with a knife to limit the incision of tissues. SYN: staff (2). 2. The head of a service or specialty division. [L. dirigo, pp. -rectus, to arrange, set in order]
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di·rec·tor də-'rek-tər, dī- n an instrument grooved to guide and limit the motion of a surgical knife
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n.
an instrument used to guide the extent and direction of a surgical incision.
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di·rec·tor (dĭ-rekґtər) [L. dirigere to direct] any person, thing, or device that guides or directs.Medical dictionary. 2011.