(rare) One who studies the brain and its workings, especially with regard to the effects of psychedelicdrugs.
1996, John Cunningham Lilly, The Scientist: A Metaphysical AutobiographyIn the film-colony of Hollywood brave neuronauts like Oscar Janiger MD charted the course of Cary Grant and hundreds of brain-settlers.
2002, Kenn Thomas, Popular Paranoia: A Steamshovel Press Anthology...and everyone's favorite neuronaut, Timothy Leary, all of whom kindly consented to Steamshovel interviews before moving to the higher plane of existence.
2008, Andrew Razeghi, The Riddle: Where Ideas Come From and How to Have Better OnesOne neuronaut of note, to whom Harvey gave a portion of Einstein's brain, is Marian C. Diamond, a researcher interested in the biology of genius...