1. One of two organs or parts in different species of animals or plants that differ in structure or development but are similar in function. 2. A compound that resembles another in structure but is not necessarily an isomer ( e.g., 5-fluorouracil is an a. of thymine); analogs are often used to block enzymatic reactions by combining with enzymes ( e.g., isopropyl thiogalactoside vs. lactose). SYN: analogue. [G. analogos, proportionate]
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ana·log (anґə-log) [shortening of analogue] 1. pertaining to electronic equipment in which data are represented by electrical signals or physical magnitudes having continuously varying values. Cf. digital (def. 3). 2. analogue.Medical dictionary. 2011.