adventitious
/ˌædvenˈtɪʃəs/adjective
1- happening or carried on according to chance rather than design or inherent nature偶然的：
adventitious similarities.
一些偶然相似点。
1.1
- coming from outside; not native外来的; 非自然的：
the adventitious population.
外来人口。
1.2
- Biology formed accidentally or in an unusual anatomical position【生】偶生的, 不定的：
adventitious lobes may appear between the primaries.
偶生裂片可能出现在初级飞羽之间。
1.3
- Botany (of a root) growing directly from the stem or other upper part of a plant【植】（根）不定的。
派生词
adventitiously
adverb词源