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pteridology (n.)

"the study of ferns as a branch of botany," 1850, with -logy + from Greek pteris "fern, bracken," probably originally "feather plant," so called for the form of the leaves, and related to pteron "wing" (from PIE root *pet- "to rush, to fly"). Compare fern, also supposed to be descended from a root meaning "feather." Related: Pteridologist (1845).

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Definitions of pteridology

pteridology (n.)
the branch of botany that studies ferns;
From wordnet.princeton.edu