psychochemical
/ˌsʌɪkəʊˈkɛmɪkl/adjective
1Of, relating to, or involving the chemistry of psychological processes.
2Of, relating to, or designating a psychoactive substance, especially a drug.
noun
A psychoactive drug, especially one used as a chemical weapon.
Origin
Late 19th century; earliest use found in The Philosophical Review. From psycho- + chemical.
- know-nothing
- know-nothingism
- know-nothingness
- know-not-what
- known quantity
- know one's onions
- know one's own mind
- know one's way around (or about)
- knowpert
- know someone by sight
- know someone in the biblical sense
- know something backwards
- know something for a fact
- know something inside out
- know something like the back of one's hand
- know the ropes
- know the score
- know what one is about
- know what one is talking about
- know what one likes
- know what's what
- know which side one's bread is buttered (on)
- know who's who
- Knox, Henry
- Knox, John