1. cladoxylopsid - Noun
2. cladoxylopsid - Adjective
English Wikipedia has an article on:cladoxylopsidWikipedia
cladoxylopsid (plural cladoxylopsids)
Any of several plants, known only as fossils, that are thought to be ancestors of ferns and horsetails
cladoxylopsid (not comparable)
Of or pertaining to these plants, of the extinct class †Cladoxylopsida