pteridology Syllabification: (pter·i·dol·o·gy)Pronunciation: /ˌterəˈdäləjē/Definition of pteridology noun the study of ferns and related plants. Derivatives pteridologicalPronunciation: /-dlˈäjikəl/ adjective pteridologistPronunciation: /-jist/ noun Origin: mid 19th century: from Greek pteris, pterid- 'fern' + -logypteridology in other Oxford dictionaries Definition of pteridology in the British & World English dictionary