Definition of butyl nitrite
: an oily liquid ester C4H9NO2 of butyl alcohol and nitrous acid that is inhaled illicitly especially as an aphrodisiac — compare popper
First Known Use of butyl nitrite
Medical Definition of butyl nitrite
: a colorless pungent liquid C4H9NO2 inhaled by drug users for its stimulating effects which are similar to those of amyl nitrite—called also isobutyl nitrite
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