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causal; additional; supervenient; foreign. To things of great dimensions, if we annex an adventitious idea of terror, they become without comparison greater. Burke.

Supplemental; additional; adventitious; ascititious. "Adscititious evidence." Bowring. -- Ad`sci*ti"tious*ly, adv.

Adventitious. Gray.

A disease or diseases, or adventitious circumstances or conditions, coexistent with and modifying a primary disease, but not necessarily connected with it.

enuate; to weaken. Lest these colors should be diluted and weakened by the mixture of any adventitious light. Sir I. Newton.

Of or pertaining to an episode; adventitious. -- Ep`i*so"dic*al*ly, adv. Such a figure as Jacob Brattle, purely episodical though it be, is an excellent English portrait. H. James.

a parent; derived, as from an ancestor. [R.] The threefold distinction of profectitious, adventitious, and professional was ascertained. Gibbon.

An adventitious sound, usually of morbid origin, accompanying the normal respiratory sounds. See Rhonchus.

An adventitious whistling or snoring sound heard on auscultation of the chest when the air channels are partially obstructed. By some writers the term rhonchus is used as equivalent to râle in its widest sense. See Râle.

A leguminous plant (Genista tinctoria) of Europe and Russian Asia, and adventitious in America; -- called also greenwood, greenweed, dyer's greenweed, and whin, wood-wash, wood-wax, and wood- waxen.