adˈventive, a. and n.
[f. L. advent- (ppl. stem of advenī-re, see advene) + -ive, as if ad. L. *adventīvus. Cf. preventive, inventive.]
A. adj.
1. Used by Bacon for adventitious. Obs.
| 1605 Bacon Adv. Learn. ii. xi. §1 The considerations of the original of the soul, whether it be natiue or adventiue. 1626 ― Sylva §456 (1651) The Cause may be, for that Adventiue Heat doth chear up the Natiue Juyce of the Tree. |
2. Bot. Of a plant: growing spontaneously but not native to the locality in which it appears; imperfectly naturalized.
| 1867 Gray Man. Bot. (ed. 5) 16, I have classified our introduced plants..into two sorts, the thoroughly naturalized, and the adventive;..the second, those which are only locally spontaneous. 1888 F. A. Lees Flora of W. Yorks. 313 It is luxuriant as to size and adventive. 1919 I. Hayward & G. C. Druce (title) The adventive flora of Tweedside. 1936 Nature 11 Apr. 600/2 A survey of the weed flora of the northern part of the United States shows that a large proportion of the adventive weeds are from Europe. |
B. n.
1. An immigrant, a sojourner. Obs.
| a 1626 Bacon Adv. Villiers (T.) That the natives be not so many, but that there may be elbow-room enough for them, and for the adventives also. |
2. An adventive plant.
| 1888 F. A. Lees Flora of W. Yorks. 313 Campanula Trachelium L...by the tram-road from Manor Coal-pits, Sheffield... An adventive here, clearly. |