tree fern: Meaning and Definition of

tree' fern"

Pronunciation: [key]
  1. any of various ferns, mostly tropical and chiefly of the family Cyatheaceae, that attain the size of trees, sending up a straight trunklike stem with foliage at the summit.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.