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; half (of an amount)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. haploid (organism, cell, etc.); haplontBiology Discussions Log in to talk about this word.