ˈ ̷ ̷ ̷ ̷ˌsēn, -ˌzēn, -_sə̇n noun
( -s )
Etymology: International Scientific Vocabulary cyt- + -ose + -ine; originally formed as German zytosin
: a crystalline pyrimidine base C 4 H 5 N 3 O obtained especially by hydrolysis of nucleic acids and also made synthetically; 4-amino-2(1 H )-pyrimidin-one