はんすう 半数 Common word LinksSentence search for 半数Sentence search for はんすうKanji details for 半 and 数Edit in JMdict Noun, Noun which may take the genitive case particle 'no'1. half the numberがくせい学生のはんすう半数がやす休んでいた。Half the students were absent.Noun, Noun which may take the genitive case particle 'no'2. haploidBiology Discussions Log in to talk about this word.