(a.) Characterized by accumulation; serving to collect or amass; cumulative; additional.

accessory accidental accumulative added additive additory adscititious adventitious ancillary another appurtenant ascititious auxiliary casual circumstantial collateral contingent contributory cumulative else extra farther fortuitous fresh further incidental inessential more new nonessential other plus renewed secondary spare subsidiary summational summative superadded superfluous supernumerary supervenient supplemental supplementary surplus ulterior unessential