The word "melaniridosome" is not a commonly known word, but it refers to a subspecies of algae that possess a specific type of pigment granule. The IPA phonetic transcription of this word is /meləˌnīrəˈdōsōm/. The spelling of this word can be broken down into its constituent parts: "melani-" refers to the Latin word for black, "irido-" refers to the Greek word for rainbow, and "-some" is a suffix that denotes a body or structure. Therefore, "melaniridosome" can be understood as a black, rainbow-colored pigment granule in algae.