"ionic" refers to something related to ions, which are charged particles. In chemistry, it usually refers to a type of bonding that happens when atoms gain or lose electrons to become positively or negatively charged ions. Full definition
Windows Central review: Fitbit Ionic Fitbit Versa hands - on: Fitbit's finally getting serious about smartwatches (windowscentral.com)
Any attempt to make claims about detrimental effects of of ionic silver (there are no detrimental effects known) would also apply to the product they are trying to promote. (bio-alternatives.net)
Concentrations over the saturation point of Ionic Silver in water [~ 10 PPM] will progressively and variably form more and more non-conductive «particles» accounting for some of the difference between Faraday Equation Prediction vs Conductivity Monitoring. (elixa.com)