Origin of recon
An Americanism dating back to 1915–20; by shortening
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Word Origin and History for reconning
Online Etymology Dictionary, © 2010 Douglas Harper
- The smallest genetic unit capable of recombination.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.