Pronunciation key

( ad′ven-tishəs )



[L. adventicius coming from abroad, not properly belonging to. See ADVENT].

  1. Outside addition. Accidental. Not inherent.
  2. In botany, growth occuring in abnormal or unusual places such as adventitious leaves arising at some other location rather than the leaf axils, or roots springing from stems or leaves.


  • Webster's New World Dictionary of the American Language (College Edition) ©1955
  • Biology of Plants, Fourth Edition, Worth Publishers Inc., Stanford University, Peter H. Raven and Helena Curtis, ©1971
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