frontal lobe, n the largest of five lobes constituting each of the two cerebral hemispheres. The frontal lobe lies beneath the frontal bone. The frontal lobe significantly influences personality and is associated with the higher mental activities, such as planning, judgment, and conceptualizing. frontal sinus, n one of a pair of small cavities in the frontal bone of the skull that communicates with the nasal cavity. frozen sections, n a histologic section of tissue that has been frozen by exposure to dry ice.
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