tuber

Meanings

1. 1
   noun

   a thickened underground plant stem or root that stores nutrients and can produce new growth

   A potato is a stem tuber rich in stored starch.

2. 2
   noun

   anatomy: a rounded swelling or projection on a body part

   The scan showed a small tuber on the surface of the bone.

Borrowed from Latin tuber, 'swelling, hump, or knob.' Botany applied the shape word to a swollen underground storage organ, while anatomy retained the older general sense of a rounded projection.

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