progymnosperm
nounEtymology From pro- + gymnosperm.
1
Biology, Natural sciences A very early form of plant that produced both wood (like trees) and spores (like ferns).
- Pycnoxylic wood is a primitive feature of progymnosperms with regard to manoxylic wood with wide and high rays.1991, Transactions of the Royal Society of Edinburgh: Earth sciences, page 122: