/meuh thak"weuh lohn', meth'euh kway"lohn, -kwol"ohn/ , n. Pharm.
a nonbarbiturate sedative-hypnotic substance, C 16 H 14 N 2 O, used to induce sleep: also widely used as an illicit drug.
[ 1960-65; METH(YL) + -a- of uncert. derivation + qu ( in ) a ( zo ) l ( in ) one (see QUINAZO-LINE, -ONE) ]