numeral, proper name · the third of the ten Heavenly Stems; third in order; equivalent to the letter 'C' or Roman numeral 'III' in a sequence

他的考试成绩是丙等。

numeral · an ancient Chinese compass point representing 165 degrees

丙位在罗盘上代表方位的一百六十五度。

noun · a prefix used in organic chemistry to denote three carbon atoms, such as in propane or propyl groups

丙基是含有三个碳原子的有机官能团。