Resembling or relating to ferns of the genus Dryopteris, particularly in structure or characteristics.
From 'Dryopteris' plus the suffix '-oid' (meaning 'resembling' or 'like'), commonly used in botanical terminology to describe structural similarities.
The '-oid' suffix is science's way of saying 'looks like but isn't exactly'—a 'dryopteroid' fern has the appearance and structure of Dryopteris without necessarily belonging to that genus, which is crucial when naming fossils or uncertain specimens.
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