bacteriochlorophyllEnglishMerriam-Webster Dictionarybacteriochlorophyll nounbac·te·ri·o·chlo·ro·phyll | \ bak-ˌtir-ē-ō-ˈklȯr-ə-ˌfil , -fəl \ a pyrrole derivative in photosynthetic bacteria related to the chlorophyll of higher plants Definition : a pyrrole derivative in photosynthetic bacteria related to the chlorophyll of higher plantsFirst Known Use1937, in the meaning defined abovebacteriochlorophyll nounbac·te·ri·o·chlo·ro·phyll | \ bak-ˌtir-ē-ō-ˈklȯr-ə-ˌfil , -fəl \ a pyrrole derivative in photosynthetic bacteria related to the chlorophyll of higher plants Definition : a pyrrole derivative in photosynthetic bacteria related to the chlorophyll of higher plantsFirst Known Use1937, in the meaning defined above