The word "proteuses" is spelled with the vowel combination of "eu" which can be confusing for English speakers. It is pronounced /proh-too-seez/ and is the plural form of "proteus". Proteus is a mythological sea god who had the ability to change his shape, just like the many species of bacteria that share his name. The correct spelling and pronunciation of this word is important for those studying biology or mythology, as well as anyone who wants to improve their language skills.