Dictionary Definition :
Definition[1]
:
The fourth and fifth fingers of the left hand which in India are used at stool, the unclean fingers.
Source
:
A Dictionary of Chinese Buddhist Terms, William Edward Soothill and Lewis Hodous
Definition[2]
:
意即不淨之手指。指左手無名指、小指。印度之習俗,如廁後以左手無名指、小指洗淨,故稱觸指,忌觸及食器。入眾日用清規(卍續一一一‧四七二下):「護第四指、第五指,為觸指,不得用。」〔日用軌範展鉢
Source
:
佛光電子大辭典
Page
:
p6805