bryology Syllabification: (bry·ol·o·gy)Pronunciation: /brīˈäləjē/Definition of bryology noun the study of mosses and liverworts. Derivatives bryologicalPronunciation: /ˌbrīəˈläjikəl/ adjective bryologistPronunciation: /-jist/ noun Origin: mid 19th century: from Greek bruon 'moss' + -logybryology in other Oxford dictionaries Definition of bryology in the British & World English dictionary