Definition of chemics:
(adj) :
(now rare) Chemical.
(adj) :
(archaic) Practising chemistry (or, earlier, alchemy); pertaining to these sciences.
(n) :
(now rare) A chemist or (earlier) an alchemist.
(adj) :
(obsolete) Produced through alchemy; counterfeit.
(n) :
(obsolete) A solution of chloride of lime, used in bleaching.
(v) :
(obsolete, transitive) To bleach with a solution of chloride of lime.