1. A short, thick underground stem or root of a plant, bearing buds from which new plants arise; used as a storage organ
A potato is a tuber that grows underground.
Uma batata é um tubérculo que cresce sob terra.
2. Any rounded, swollen plant structure that functions in food storage or vegetative reproduction
The tuber of the cassava plant is used to make flour.
O tubérculo da mandioca é usado para fazer farinha.