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adventitious a. 偶然的,外來的 偶然的,外來的 adventitious adj 1: 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" adventitious \ ad` ven* ti" tious\ ([ a^] d` v[ e^] n* t[ i^] sh"[ u^] s), a. [ L. adventitius.] 1. Added extrinsically; not essentially inherent. Syn: accidental; casual; incidental; additional; supervenient; foreign. [ 1913 Webster PJC] To things of great dimensions, if we annex an adventitious idea of terror, they become without comparison greater. -- Burke. [ 1913 Webster] 2. ( Nat. Hist.) Out of the proper or usual place; as, adventitious buds or roots. [ 1913 Webster] 3. ( Bot.) Accidentally or sparingly spontaneous in a country or district; not fully naturalized; adventive; -- applied to foreign plants. [ 1913 Webster] 4. ( Med.) Acquired, as diseases; not hereditary. -- AS [ 1913 Webster] 5. ( Med.) Occurring in an unusual place or arising from an external source. -- Stedman 25 [ PC] -- { Ad` ven* ti" tious* ly}, adv. -- { Ad` ven* ti" tious* ness}, n. [ 1913 Webster] 46 Moby Thesaurus words for " adventitious": accessory, accidental, additional, adscititious, aleatory, appurtenant, ascititious, auxiliary, casual, causeless, chance, chancy, circumstantial, collateral, conditional, contingent, destinal, dicey, extra, fatal, fatidic, fluky, fortuitous, iffy, incidental, indeterminate, inessential, nonessential, occasional, provisional, risky, secondary, subsidiary, superadded, superfluous, supervenient, supplemental, supplementary, uncaused, undetermined, unessential, unexpected, unforeseeable, unforeseen, unlooked- for, unpredictable
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