Definition of tubers:
(n) :
A fleshy, thickened underground stem of a plant, usually containing stored starch, for example a potato or arrowroot.
(n) :
(horticulture) A thickened rootstock.
(n) :
(anatomy) A rounded, protuberant structure in a human or animal body.
(n) :
One who tubes.
(n) :
A surname.