Coming from an external source or occurring in an unusual place or manner. Not inherent, inherited or innate but rather occurring accidentally or spontaneously. When a doctor or nurse auscults (listens to) the chest or abdomen, adventitious sounds are those that are normally not heard coming from the chest or abdomen. The word "adventitious" comes from the Latin "adventicius" meaning "foreign, strange, extraneous, coming from abroad or from outside." This, in turn, comes from the verb "advenire" meaning "to come to" or "to arrive." Other English words that stem from "advenire" include "adventure," "avenue," and the medical term "adventitia."
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1. Arising from an external source or occurring in an unusual place or manner. SEE ALSO: extrinsic. 2. Occurring accidentally or spontaneously, as opposed to natural causes or hereditary. 3. SYN: adventitial.

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ad·ven·ti·tious -əs adj
1 a) arising sporadically or in other than the usual location <an \adventitious part in embryonic development>
b) occurring spontaneously or accidentally in a country or region to which it is not native <an \adventitious insect>
3) not congenital <\adventitious deafness>
ad·ven·ti·tious·ly adv

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1. occurring in a place other than the usual one.
2. relating to the adventitia.

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ad·ven·ti·tious (ad″ven-tishґəs) [ad- + venire to come] 1. accidental or acquired; not natural or hereditary. 2. found somewhere other than in the normal or usual place. 3. adventitial.

Medical dictionary. 2011.

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Look at other dictionaries:

  • Adventitious — Ad ven*ti tious, a. [L. adventitius.] 1. Added extrinsically; not essentially inherent; accidental or causal; additional; supervenient; foreign. [1913 Webster] To things of great dimensions, if we annex an adventitious idea of terror, they become …   The Collaborative International Dictionary of English

  • adventitious — [ad΄ven tish′əs, ad΄vəntish′əs] adj. [L adventicius, coming from abroad: see ADVENT] 1. added from outside; not inherent; accidental 2. occurring in unusual or abnormal places [adventitious roots growing on a stem] SYN. ACCIDENTAL adventitiously… …   English World dictionary

  • adventitious — adventitious. См. придаточный. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • adventitious — I adjective accidental, acquired, casual, circumstantial, external, extraneous, extrinsic, extroverted, foreign, fortuitous, incidental, outward, outward looking, random, subordinate, subsidiary, transcendent, unintentional, unwitting II index… …   Law dictionary

  • adventitious — (adj.) of the nature of an addition from without, c.1600, from M.L. adventitius coming from abroad, extraneous, a corruption of L. adventicius foreign, strange, accidental, from advent pp. stem of advenire arrive (see ADVENT (Cf. advent)).… …   Etymology dictionary

  • adventitious — *accidental, incidental, fortuitous, casual, contingent Analogous words: acquired (see GET): accessory, subservient (see AUXILIARY) Antonyms: inherent Contrasted words: constitutional, essential, intrinsic, ingrained (see INHERENT): *innate,… …   New Dictionary of Synonyms

  • adventitious — ► ADJECTIVE 1) happening according to chance. 2) Botany (of roots) growing directly from the stem or other upper part of a plant. DERIVATIVES adventitiously adverb. ORIGIN Latin adventicius coming to us from abroad …   English terms dictionary

  • adventitious — adjective Etymology: Latin adventicius Date: 1603 1. coming from another source and not inherent or innate < a Federal house without adventitious later additions > 2. arising or occurring sporadically or in other than the usual location …   New Collegiate Dictionary

  • adventitious — accidental, occurring at an unusual locality, as in an adventitious visitor …   Dictionary of ichthyology

  • adventitious — adjective /ˌæd.vɛnˈtɪʃ.əs,ˌæd.vənˈtɪʃ.əs/ a) From an external source; not innate or inherent, foreign. The Velloziaceae have evolved a woody stem which is covered with a layer of adventitious roots mingled with the fibres of the old leaf sheaths; …   Wiktionary

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