(chiefly in the plural) An incompatible substance; one of a group of things that cannot be placed or used together because of a change of chemical composition or opposing medicinal qualities.
User Defined Definitions
"not compatible"
"used especially of drugs or muscles that counteract or neutralize each other's effect"
"not suitable to your tastes or needs"
"incapable of being used with or connected to other devices or components without modification"
"of words so related that one contrasts with the other"
"not easy to combine harmoniously"
"not compatible with other facts"
"not in keeping with what is correct or proper"
"used especially of solids or solutions; incapable of blending into a stable homogeneous mixture"