ɔːlðˈoʊ sˌaɪɐnˌɑːbɐktˈɪɹiə ɑːɹ ˈɔfən ɹᵻfˈɜːd tʊ æz "blˈuːɡɹˈiːn ˈælɡiː", mˈoʊst ɐθˈɔːɹɪɾiz ɛksklˈuːd ˈɔːl pɹˈɑːkɐɹɪˌoʊts, ɪŋklˈuːdɪŋ sˌaɪɐnˌɑːbɐktˈɪɹiə, fɹʌmðə dˌɛfɪnˈɪʃən ʌv ˈælɡiː.
Although cyanobacteria are often referred to as "blue-green algae", most authorities exclude all prokaryotes, including cyanobacteria, from the definition of algae.