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adventitiously ad. 偶然地 偶然地 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]
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