homolog
/ˈhɑməˌlɔɡ/
noun
- Something that is similar in position, structure, or function to something else, especially in different species or systems.
- In chemistry, ethanol is a homolog of methanol, differing by one CH₂ group.
- The human arm and a bat's wing are homologs, sharing a common evolutionary origin.
- Biologists compared the bird's beak to the homolog in a dinosaur fossil.
Synonyms