adventitious

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

(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.

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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.

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.

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.