Adventitious Definition & Meaning

Origin of Adventitious

From Latin adventīcius foreign from adventus arrival advent

From American Heritage Dictionary of the English Language, 5th Edition
From Latin adventicius (“foreign”), from adveniō (“arrive”).

From Wiktionary

The growth of the primary root is limited; sooner or later adventitious roots develop from the axis above the radicle which they ultimately exceed in growth.
Owing to various adventitious circumstances the sect came into great prominence politically and ecclesiastically for a few years about the middle of the 14th century.
If we meet with phenomena which do not fit easily into this view, we have the alternatives either to modify our assumed laws of motion, or to call to our aid adventitious forces, or to examine whethet the discrepancy can be reconciled by the simpler expedient of a new basis of reference.
Just as each kind of fermentation possesses a definite organized ferment, so many diseases are dependent on the presence of a distinct microbe; and just as the gardener can pick out and grow a given plant or vegetable, so the bacteriologist can (in most cases) eliminate the adventitious and grow the special organism - in other words, can obtain a pure cultivation which has the power of bringing about the special disease.
Thus (e.g.) " natural rights " become rights of which the general observance would be useful apart from the institution of civil government; as distinguished from the no less binding " adventitious rights," the utility of which depends upon this institution.

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