Rhyniaceae
plural noun
Rhy·ni·a·ce·ae
\ˌrīnēˈāsēˌē\
Definition of Rhyniaceae
: a family of Paleozoic plants (order Psilophytales) known chiefly from the genera Rhynia and Horneophyton
From the M-W Editors
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Origin and Etymology of rhyniaceae
New Latin, from Rhynia, type genus + -aceae
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