any of 13 heterocyclic compounds with the formula C4H5NO
Word origin
from oxy-2 + azine
oxazine in American English
(ˈɑksəˌzin; ˈɑksəzɪn)
noun
any of thirteen compounds having a composition corresponding to the formula C4H5NO and composed of molecules which contain four atoms of carbon and one atom each of oxygen and nitrogen united in a ring structure