- A compound that resembles another in structure but is not necessarily an isomer (5-fluorouracil is an analogue of thymine); analogues are often used to block enzymatic reactions by combining them with enzymes (isopropyl thiogalactoside vs. lactose).
- One of two organs or parts in different species of animals or plants that differ in structure or development but are similar in function.
[G. analogos, proportionate]
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Examples: glitazone, GI cocktail, etc.