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 ▲