noun
also can·u·la ˈkanyələ
( plural cannulas -ləz ; or cannu·lae -ˌlē)
Etymology: New Latin, from Latin cannula small reed, diminutive of canna reed — more at cane
: a small tube made for insertion into a body cavity (as for drainage) or into a duct or vessel and sometimes fitted with a trocar during the act of insertion