- Hal·dan Kef·fer [hawl-duh n kef-er] /ˈhɔl dən ˈkɛf ər/, 1903–83, U.S. physiologist: Nobel Prize in Medicine 1967.
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Hartline(härt′līn′)Haldan Keffer 1903-1983
- American biophysicist. He shared a 1967 Nobel Prize for research on the physiological and electrical activities of the optic nerve and the eye.
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