pisiformyoudaoicibaDictYouDict[pisiform 词源字典]
"A small rounded carpal bone situated where the palm of the hand meets the outer edge of the wrist and articulating with the triquetral", Mid 18th century: from modern Latin pisiformis 'pea-shaped', from pisum 'pea' + forma 'shape'.[pisiform etymology, pisiform origin, 英语词源]