/ Dictionary / Index P pteridology: Meaning and Definition of Find definitions for: pter•i•dol•o•gy Pronunciation: (ter"i-dol'u-jē), [key] — n. the branch of botany dealing with ferns and related plants, as the horsetails and club mosses. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pteridology (Thesaurus) pterido- pteridophyte Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language