tu‧ber /ˈtjuːbə $ ˈtuːbər/ noun [countable]
[Date: 1600-1700; Language: Latin; Origin: 'lump, tuber, truffle']
a round swollen part on the stem of some plants, such as the potato, that grows below the ground and from which new plants grow
—tuberous adjective

[TahlilGaran] Dictionary of Contemporary English ▲