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pteridology (ter-i-DOL-uh-jee) - n., the study of ferns.


Or more specifically, of plants of the division Pteridophyta, which encompass all vascular plants that reproduce using spores rather than seeds, which include things like club mosses and horsetails as well as ferns. The ultimate root is the stem form pterid- of Greek pterís, fern, which is some kind of derivative of pterón, feather.

---L.

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