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Longman Dictionary of Contemporary English
adventitious
adjective
EXAMPLES FROM CORPUS
▪ But the more rapidly an organism learns, the more vulnerable it is to adventitious contingencies.
▪ More importantly, the definition of the adventitious population stresses an element of choice in rural residence.
▪ There was an adventitious contributing cause.
The Collaborative International Dictionary
Adventitious

Adventitious \Ad`ven*ti"tious\, a. [L. adventitius.]

  1. Added extrinsically; not essentially inherent; accidental or causal; additional; supervenient; foreign.

    To things of great dimensions, if we annex an adventitious idea of terror, they become without comparison greater.
    --Burke.

  2. (Nat. Hist.) Out of the proper or usual place; as, adventitious buds or roots.

  3. (Bot.) Accidentally or sparingly spontaneous in a country or district; not fully naturalized; adventive; -- applied to foreign plants.

  4. (Med.) Acquired, as diseases; accidental. [1913 Webster] -- Ad`ven*ti"tious*ly, adv. -- Ad`ven*ti"tious*ness, n.

Douglas Harper's Etymology Dictionary
adventitious

"of the nature of an addition from without," c.1600, from Medieval Latin adventitius "coming from abroad, extraneous," a corruption of Latin adventicius "foreign, strange, accidental," from advent- past participle stem of advenire "arrive" (see advent). Related: Adventitiously; adventitiousness.

Wiktionary
adventitious

a. 1 From an external source; not innate or inherent, foreign. 2 accidental, additional, appearing casually. 3 (context genetics medicine English) Not congenital; acquired. 4 (context biology English) Developing in an unusual place or from an unusual source.

WordNet
adventitious

adj. associated by chance and not an integral part; "poetry is something to which words are the accidental, not by any means the essential form"- Frederick W. Robertson; "they had to decide whether his misconduct was adventitious or the result of a flaw in his character" [syn: accidental]

Usage examples of "adventitious".

Intellectual-Principle has to give, an actuality whose advantage over Intellection is no adventitious superiority.

Solitude had killed every power in her save vanity, and the form her vanity took was peculiarly irritating to her husband, and in a lesser degree to her daughter, for neither the Elder nor Loo would have founded self-esteem on adventitious advantages of upbringing.

It must not be forgotten that his modelled work derives an adventitious merit from the splendour of the frescoes with which it is surrounded, and from our admiration of the astounding range of power manifested by their author.

A virtue is none the less to be desired for its own sake, because it has some adventitious profit connected with it: indeed, in most cases the noblest virtues are accompanied by many extraneous advantages, but it is the virtues that lead the way, and these merely follow in their train.

Dear as his daughter might become to him, all he dared to ask of Heaven was that she might be restored to that truer self which lay beneath her false and adventitious being.

Your name eternised in verse and you to glory in adventitious fluminous attributes.

Prothallus bearing young sporophyte, with a single sporangium and adventitious roots!

For this reason, as for many others, it is the duty of the Christian teacher to show that those dogmas are not an integral part of the gospel, but only an adventitious element imported into it from an earlier and unauthoritative system.

The failure of Impeachment, though fatal to his success, did not dissipate the support which his long services and marked fidelity had commanded, without any of the adventitious aids of power.

The fundamental and essential conditions of life are the same in any age, however the adventitious circumstances may change.

God to perform a spurious miracle in His honour, and a wrong to the Catholic faith, whose power is in its truth, to attempt to give adventitious lustre to its doctrines by the aid of fraud and deception.

But of these adventitious evils which are inflicted by hostile armies or by some disaster, and which attach rather to the body than the soul, I am not meanwhile disputing.

It was Ayla's adventitious combination of flint and iron pyrite that created the spark which could be made into fire.

When it caught a comet in its fibrous net, it shed its adventitious leaves within the circle of contact and sent out root hairs to melt and drink every last drop.

Many stem cells, even in mature plants, have the capability of producing adventitious roots.