1964, with -ic + prosodeme (1940), from Greek proso-, probably related to pros "toward, to, at, against, near."
Online Etymology Dictionary, © 2010 Douglas Harper
[ prŏs′ə-dĕm′ĭk ]
Of or relating to a disease that is transmitted directly from person to person.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.