progymnosperm

English

Etymology

pro- +‎ gymnosperm

Noun

progymnosperm (plural progymnosperms)

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