noun
darwin
noun
1
A unit used in evolutionary biology to measure the rate of change in a trait over time.
"The researchers measured beak-size change in darwins per generation."
How to Use Darwin
Learner’s notesIn plain EnglishA specialised scientific unit for how fast a trait evolves — most people will only meet it as the naturalist's surname, "Darwin," rather than this technical unit.
Word Forms
darwins plural
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The researchers measured beak-size change in _____ per generation.
Etymology
Named after Charles Darwin, and coined by the geneticist J.B.S. Haldane in 1949.