recon · noun1
Clipping of reconnaissance.
recon · verb2
Clipping of reconnoiter.
recon · noun3
Contracted form of recombination + -on, coined by American molecular biologist Seymour Benzer in 1957 as " […] the smallest element in the one-dimensional array that is interchangeable (but not divisible) by genetic recombination."
recon · noun4
Clipping of reconstruction.
Etymology from Wiktionary, CC BY-SA 4.0.