SPHENOPSID


Meaning of SPHENOPSID in English

[sphe.nop.sid] n [ultim. fr. Gk sphen wedge + NL -opsis] (1957): any of a class (Sphenopsida or Sphenophyta) of the tracheophytes characterized by jointed ribbed stems, small leaves usu. in whorls at distinct stem nodes, and sporangia in sporangiophores and made up of the equisetums and extinct related forms

Merriam-Webster English vocab.      Английский словарь Merriam Webster.