seed fern
Also found in: Dictionary, Thesaurus, Wikipedia.
Related to seed fern: ginkgo
seed fern
[′sēd ‚fərn] (paleobotany)
The common name for the extinct plants classified as Pteridospermae, characterized by naked seeds borne on large, fernlike fronds.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.