[ ˌadv(ə)n'tɪʃəs ]
■ adjective
1》 happening according to chance.
2》 coming from outside; not native.
3》 Biology formed accidentally or in an unusual position.
4》 Botany (of a root) growing directly from the stem or other upper part of a plant.
Derivatives
~ly adverb
Origin
C17: from L. adventicius 'coming to us from abroad' + -ous (see also -itious 2 ).