adventitious

[ad″ven-tish´us]

not normal to a part.

ad·ven·ti·tious

(ad-ven-tish'ŭs),

1. Arising from an external source or occurring in an unusual place or manner.
See also: extrinsic.

2. Occurring accidentally or spontaneously, as opposed to naturally or through heredity.

3. Synonym(s): adventitial

Farlex Partner Medical Dictionary © Farlex 2012

adventitious

(ăd′vĕn-tĭsh′əs, -vən-)

adj.

1. Arising from an external cause or factor; not inherent: "These rodents ... appear suddenly in the Oligocene, as if by adventitious entrance independent of the rest of the fauna" (George Gaylord Simpson).

2. Biology Of or belonging to a structure that develops in an unusual place: adventitious roots.

ad′ven·ti′tious·ly adv.

ad′ven·ti′tious·ness n.

ad·ven·ti·tious

(ad'vĕn-tish'ŭs)

1. Arising from an external source or occurring in an unusual place or manner.
See also: extrinsic

2. Occurring accidentally or spontaneously, as opposed to natural causes or hereditary.

3. Synonym(s): adventitial.

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

adventitious

1. Accidentally acquired or added by chance.

2. Occurring in an unusual place or in an irregular manner.

Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

adventitious

(of a root) growing laterally from a stem rather than the main root, e.g. prop roots of maize, clinging roots of climbing vines, and roots of BULBS, such as the daffodil.
(of a bud) not developing in a leaf axil, as in Begonia where such buds can be produced from leaf wounds.

Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

ad·ven·ti·tious

(ad'vĕn-tish'ŭs)

1. Arising from an external source or occurring in an unusual place or manner.

2. Occurring accidentally or spontaneously, as opposed to naturally or through heredity.

3. Synonym(s): adventitial.

Medical Dictionary for the Dental Professions © Farlex 2012

Mentioned in

References in periodicals archive

Physiological and molecular regulation of adventitious root formation.

Vegetative propagation of raspberry from leafy cuttings/Propagacao vegetativa de brotacoes caulinares de framboeseira

In the interaction of hydric conditions within rootstocks for adventitious root number, on normal hydric condition the rootstock G.202 presented more adventitious root number, while in waterlogged condition the rootstock G.213 presented less emission of adventitious roots.

Tolerance of apple rootstocks to short-term waterlogging/Tolerancia de porta-enxertos de macieira ao encharcamento temporario

Thus, the obtainment of complete plants of Casearia sylvestris occurred in two stages, one of formation of aerial shoots followed by that of adventitious rooting.

IN VITRO PROPAGATION OF Casearia sylvestris SWARTZ (SALICACEAE)/PROPAGACAO IN VITRO DE Casearia sylvestris SWARTZ (SALICACEAE)

Patients with adventitious sounds experienced a longer hospital stay (Table 1).

Markers of disease severity in patients with Spanish influenza in the Japanese Armed Forces, 1919-1920

The sites of origin for the formation of adventitious roots in stem cuttings are vascular bundles or nearby areas.

Sexual and vegetative propagation of the medicinal Mexican species Phyllonoma laticuspis (Phyllonomaceae)

The surface-sterilized primary explants of red pitaya were inoculated in culture medium for adventitious shoot induction and proliferation.

High-efficiency Micropropagation of Dormant Buds in Spine Base of Red Pitaya (Hylocereus polyrhizus) for Industrial Breeding

There was no interaction for roots in any of the evaluated layers, as well as for dry matter of adventitious roots and total root dry matter.

Bulk density and water tensions in the soil on corn root production/Densidades e tensoes de agua no solo na producao de raizes de milho

The regeneration system of yacon has been established using adventitious buds or stem as explants, and virus-free seedlings have been successfully obtained (Zeng, 2004).

IN VITRO INDUCTION OF YACON TUBEROUS ROOT AND IDENTIFICATION OF GENES ASSOCIATED WITH TUBEROUS ROOT EXPANSION

Ivy has adventitious roots that help it to cling to a host, clematis wrap their leaf stems around the twigs of other plants and roses developed thorns to pull themselves up through branches.

THE ONLY WAY IS UP; Climbers are ideal for adding another dimension to your garden by bringing the colour, structure and excitement to a whole new level

An aerial stem system of plumular origin and an underground stem system of cotyledonary bud origin have been described, and the root system is completely adventitious and formed by the underground stem axis (Andreata and Menezes, 1999).

Axillary bud and pericycle involved in the thickening process of the rhizophore nodes in Smilax species/Gema axilar e periciclo envolvidos no processo de espessamento nodal do rizoforo em especies de Smilax