seed fern

noun
  1. any of various plants of the order Lyginopteridales (or Cycadofilicales), known only as fossils, having fernlike leaves and reproducing by means of seeds.

Origin of seed fern

First recorded in 1925–30
Also called pteridosperm.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for seed fern

seed fern

noun
  1. another name for pteridosperm
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012