Definition of "cannula"

cannula

/ˈkænjʊlə/

noun
plural cannulas or cannulae or cannulæ
1. (medicine) A tube inserted in the body to drain or inject fluid.
  Quotations
  The cannula had come askew in his nose and he pushed it straight, his hand moving slowly, like the hand of a man who is dreaming with his eyes open.
  2012, Stephen King, 11/22/63, p. 819-820
2. (aviation) A hose or tube that connects directly from an oxygen (O2) bottle/source to the user's nose, commonly used by aircraft pilots or others needing direct oxygen breathing apparatus.