Pinosome is a term used in cell biology to describe a type of organelle found in certain types of cells. Its correct pronunciation is /paɪnəsoʊm/ and can be broken down into three syllables: "pie" + "nuh" + "sohm". The "i" is pronounced as in "pie", the "o" is pronounced as in "no", and the final syllable is pronounced with a long "o" as in "home". The spelling of "pinosome" accurately reflects its pronunciation and is not commonly misspelled.