a much thickened underground part of a stem or rhizome, e.g. in the potato, serving as a food reserve and bearing buds from which new plants arise
块茎。
a tuberous root, e.g. of the dahlia
块根。
【剖】 结节,隆起,肿胀。
" mid 17th cent.: from Latin, literally ‘hump, swelling’. "