HAUSTORIUM
haustorium
(noun) a root-like attachment in parasitic plants that penetrates and obtains food from the host
Source: WordNet® 3.1
Etymology
Noun
haustorium (plural haustoria)
A root of a parasitic plant modified to take nourishment from its host.
A cellular structure, growing into or around another structure to absorb water or nutrients, such as a cotyledon.
Source: Wiktionary
Haus*to"ri*um, n.; pl. Haustoria. Etym: [LL., a well, fr. L. haurire,
haustum, to drink.] (Bot.)
Definition: One of the suckerlike rootlets of such plants as the dodder and
ivy. R. Brown.
Source: Webster’s Unabridged Dictionary 1913 Edition