əˈläksəˌzēn noun
( -s )
Etymology: allox- + azine
: either of two acidic compounds C 10 H 6 N 4 O 2 containing a pyrimidine ring fused to quinoxaline:
a. : a grayish green powder obtained by reaction of alloxan with ortho -phenylenediamine
b. : isoalloxazine