n.any of numerous usually tropical ferns having a thick woody stem or caudex and a crown of large fronds; found especially in Australia and New Zealand; chiefly of the families Cyatheaceae and Marattiaceae but some from Polypodiaceae
同义词：tree fern
英汉双解大词典
tree fern
1.
N（名词）
any of numerous large tropical ferns, mainly of the family Cyatheaceae, having a trunklike stem bearing fronds at the top 树蕨