柯林斯词典tuber /ˈtjuːbə/ (tubers) 1. N-COUNT A tuber is the swollen underground stem of particular types of plants. 块茎 返回 tuber剑桥词典a swollen underground stem or root of a plant from which new plants can grow , as in the potato （马铃薯等植物的）块茎 返回 tuber