tubers

(Variation and inheritance) enlarged underground plant stems which store food

tubers

a swollen, underground stem that has buds from which new plant shoots can grow. An example of a tuber is a potato.
Found on http://www.windowsintowonderland.org/eobe/glossary.shtml

Tubers

Swollen underground stems in plants that store food, such as the irish potato.
Found on http://www.superglossary.com/Glossary/Science/Biology/
No exact match found