haus·to·ri·um 
(hô-stôrē-əm)
(hô-stôrē-əm)n. pl. haus·to·ri·a (hô-stôrē-ə)
A specialized structure of a parasitic fungus or plant, used to absorb nutrients and water from the host plant.
[New Latin haustōrium, from Latin haustus, a drawing in, absorption, from past participle of haurīre, to draw up.]
haus·tori·al adj.