phycology Syllabification: (phy·col·o·gy)Pronunciation: /fīˈkäləjē/Definition of phycology noun the branch of botany concerned with seaweeds and other algae. Derivatives phycologicalPronunciation: /ˌfīkəˈläjikəl/ adjective phycologistPronunciation: /-jist/ noun phycology in other Oxford dictionaries Definition of phycology in the British & World English dictionary