analog /an″əlog/ [Gk, analogos, proportionate] , 1. a substance, tissue, or organ that is similar in appearance or function to another but differs in origin or development, such as the eye of a fly and the eye of a human. 2. a drug or other chemical compound that resembles another in structure or constituents but has different effects. Also spelled analogue. Compare homolog. −analogous, adj. 3. (in computer processing) a mechanical computer that performs arithmetical operations using variables to represent numbers. Compare digital.
