n. Scotch and northern English form of one.n. A suffix of Latin origin, the same as -an, as in mundane, ultramontane, etc.n. In chem., a termination denoting that the hydrocarbon the name of which ends with it belongs to the paraffin series having the general formula CnH2n + 2: as, methane, CH4; ethane, C2H6.A suffix applied to the names of classes in the quantitative classification of igneous rocks. See rock.