atopy (n.) Look up atopy at Dictionary.com
"type of abnormal hypersensitiveness," 1923, coined by Edward D. Perry, professor of Greek at Columbia University, at the request of medical men, from Greek atopia "unusualness, strangeness, a being out of the way," from atopos "out of place, strange, odd, eccentric," from a- "not, without" (see a- (3)) + topos "place" (see topos).