cresson cres·son US/ˈkrɛsʌn/ uncommon adjective 1. of a moderate yellow-green color that is greener and deeper than moss green and yellower and darker than pea green Synonymscress greenwatercress Similarchromatic WordNet 2.1 (Princeton University). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.