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n. pl. haus·to·ri·a (hô-stôr′ē-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·to′ri·al adj.


n, pl -ria (-rɪə)
(Plant Pathology) the organ of a parasitic plant that penetrates the host tissues and absorbs food and water from them
[C19: from New Latin, from Late Latin haustor a water-drawer; see haustellum]
hausˈtorial adj


(hɔˈstɔr i əm, -ˈstoʊr-)

n., pl. haus•to•ri•a (hɔˈstɔr i ə, -ˈstoʊr-)
1. a projection from the hypha of a fungus into the organic matter from which it absorbs nutrients.
2. the penetrating feeding organ of certain parasites.
[1870–75; < New Latin, = Latin haus-, variant s. of haurīre to scoop up, draw + -tōrium -tory2]
haus•to′ri•al, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.haustorium - a root-like attachment in parasitic plants that penetrates and obtains food from the host
plant process, enation - a natural projection or outgrowth from a plant body or organ
References in periodicals archive ?
Haustorial cells arise on the hyphae, basidia with oblique to vertical septa.
Haustorial hemiparasites which insert themselves into the host's vascular system.
The first responses during haustorial initiation are cortical enlargement and increasing cell division, resulting in lateral or apical protuberances in the parasite root similar to other Orobanchaceae, such as Bartsia, Lathraea, Melampyrum, Pedicularis and Rhinanthus (Heckard 1962, Dobbins & Kuijt 1973a, Weber & Weberling 1975, Riopel & Timko 1995).
christii with a haustorial attachment on a mountain big sagebrush (Artemisia tridentata.
Like several other species of Phoradendron, the haustorial system has a single point of contact with the host (Kuijt, 1969), this causing a hypertrophy of the branches up to 30 cm in diameter.
Mistletoe (Phoradendron) and dodder (Cuscuta), for example, produce haustorial roots, which not only anchor the parasite to its host but also penetrate the host's vascular system.
Data on percentage germination and haustorial initiation were calculated for each disc, transformed to arcsine (Gomez and Gomez, 1984) and subjected to analysis of variance (ANOVA).
Haustorial development, as well as flower and fruit production, occurred when A.
The structure and development of haustorial placentas in leptosporangiate ferns provide a clear-cut distinction between euphyllophytes and lycophytes.
The mechanisms include low germination stimulant production (lgs), inhibition of haustorial formation, mechanical prevention of host cell penetration, and reduction of further growth once the pest is established.