adventitious

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Related to adventitiously: adventitious root

adventitious

(of a plant or animal part) developing in an abnormal position, as a root that grows from a stem

adventitious

[‚ad·ven′tish·əs]
(biology)
Also known as adventive.
Acquired spontaneously or accidentally, not by heredity.
Arising, as a tissue or organ, in an unusual or abnormal place.
References in periodicals archive ?
With the go/no-go procedure with compound stimuli during the tests, the participants did not emit the same sort of response sequences that may have been adventitiously reinforced during reversal training.
The group included subjects who lost their vision in the first three years of life (classified by the researchers as congenitally blind) and adventitiously blind persons.
The problem arises when a patented life form enters adventitiously onto the property of a person who is unaware of its presence.
They were all blind from birth except for one child, who was adventitiously blinded at 4 months of age.
Common reactions of individuals who have been adventitiously blinded might include a need to redefine their self-concepts.
This suggests that the return-to-left-lever response pattern may have been adventitiously reinforced, indicating the changeover delay may have been inadequate.
Tactual discrimination in adventitiously blind adults with diabetic retinopathy (2): Development of size changeable braille embossing system.
This finding suggests that the observed pattern of results could have emerged if a third mechanism induced a pattern of functional autonomic denervation resulting in both smaller right ACC volume and lower RSA magnitude that were then adventitiously correlated.
Also, persons who were congenitally blind were worse off in any area he discussed than those who became so adventitiously.
Trials continued so that "different" responses were not adventitiously reinforced via block termination; however, the first "different" response constituted the datum for the series.
Adding a transcriber's note and a tactile graphic were not considered for these items, since the study personnel thought that the adults who were adventitiously blind in the study might not yet have encountered these formats in braille.
Skinner's (1948) depiction, in his classic experiment on superstition in the pigeon, of adventitiously reinforced behavior.