/-{-{wéikè}-}-/, /-{-{wēikè}-}-/, /mei̯²¹ hɐk̚⁵/, /mei4 hak1/, /mei4 hak7/, /méi4 heg1/, /ueikeh/, /weikeh/, /weikè/, /wéikè/、/ㄨㄟ ㄎㄜˋ/、/ㄨㄟˊ ㄎㄜˋ/
質量單位，等於一百萬分之一克，符號為µg