i Register
In some senses, chymical is marked as obsolete. Watch for register when choosing this word.
adj
Obsolete form of chemical.
In describing this class of substances, it is not my design to treat of their chymical mode of action. This investigation forms one of the most interesting parts of the chymistry of agriculture: but it is not essential to that practical knowledge of the subject which will suffice for the common purposes of the farmer. The remarks to be made, therefore, on the mode of action of these bodies, will be of a very general nature.
noun
Obsolete form of chemical.