psy·cho·chem·i·cal (s  k -k m  -k l)n. A psychoactive drug or substance. adj. Of or relating to psychochemicals. |
psychochemical [ˌsaɪkəʊˈkɛmɪkəl]
n
(Chemistry) any of various chemical compounds whose primary effect is the alteration of the normal state of consciousness
adj
(Chemistry) of or relating to such chemical compounds
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