-anPronunciation: /(ə)n/Definition of -an suffix 1forming adjectives and nouns, especially from: names of places:Cuban names of systems:Anglican names of zoological classes or orders:crustacean names of founders:Lutheran 2 /an/ Chemistry forming names of organic compounds, chiefly polysaccharides:dextranOrigin:from Latin -anus, -ana, -anum-an in other Oxford dictionaries Definition of -an in the US English dictionary