Definition of Tuber Tuber: A lump or bump. For example, the
backward protrusion of the heel is called the tuber calcanei or,
alternatively, the tuberosity of the calcaneus. Small tubers are
a characteristic finding in tuberculosis, and tubers in the
brain are seen in tuberous sclerosis. Last Editorial Review:
3/19/2012 Back to MedTerms online medical dictionary A-Z List
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