A group of organisms that share the same genetic makeup and can be distinguished from other groups based on their genes.
Combines 'geno-' from Greek 'genos' (race, kind) with 'species' from Latin 'species' (appearance, form). Created in the 20th century as scientists needed terms to classify organisms by genetic similarity rather than just appearance.
Before DNA testing, scientists classified animals by how they looked; now we can group them by their actual genetic code, and 'genospecies' describes organisms that look different but are genetically the same—or vice versa!
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