adventitious

(redirected from adventitious root)
Also found in: Dictionary, Thesaurus, Legal, Encyclopedia.

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

adventitious

/ad·ven·ti·tious/ (ad″ven-tish´us)
1. accidental or acquired; not natural or hereditary.
2. found out of the normal or usual place.

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.

adventitious

1 pertaining to an accidental condition or an arbitrary action.
2 not hereditary.
3 occurring at an inappropriate place, such as a coating on an artery.

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.

adventitious

1. Accidentally acquired or added by chance.
2. Occurring in an unusual place or in an irregular manner.

adventitious

  1. (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.
  2. (of a bud) not developing in a leaf axil, as in Begonia where such buds can be produced from leaf wounds.

adventitious

formed after birth

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.

adventitious

1. accidental or acquired.
2. not in the usual place.

adventitious breath sounds
see breath sounds.
adventitious movements
purposeless movements; as seen in distemper myoclonus in dogs.
References in periodicals archive ?
An obvious elongation but slight expansion of adventitious roots was observed after they were transferred to the medium without NAA (Fig.
What are adventitious roots, and what role do they play in vegetative propagation?
When the basal node of stem cuttings was incubated in a low-ionic-strength nutrient solution for 9 d, all tested Brachiaria genotypes typically produced two to four adventitious roots (Fig.
Adventitious roots and adventitious shoots do not develop at the same rate within an individual plant or among different species.
Moisture and temperature requirements for adventitious root development in blue grama seedlings.
Influences of auxins and auxin synergists on adventitious root primordium initiation and development.
With regard to the effect of substrate on callus formation, the fact that there was decreased callus formation when erva mate cuttings were grown in sand indicated the superiority of this substrate, since the absence of calli has been cited as a factor in the formation of adventitious roots (MACHADO et al.
Peroxidase activity during adventitious root formation in avocado microcuttings.
It is notable that tuberisation is generally bilateral (Figure 7), and an adventitious root is formed at the end of each projection (Figure 10) whose pericyclic origin is evidenced by the continuity of the endodermis with U-shaped thickening (Figure 11).
Treatment of the cuttings with various substances to stimulate the in adventitious root has as ancient history.