A hollow tube with a sharp, retractable inner core that can be inserted into a vein, an artery, or another body cavity.

1680s in surgical sense, from Latin cannula "small reed or pipe," diminutive of canna "reed, pipe" (see cane (n.)).

A tube for insertion into a duct or cavity in order to drain off fluid or give medication.

The tube placed into he body that allows fluids to escape or placed in a blood vessel to administer medications.

n. a thin, narrow tube which is designed to be safely inserted into the body. As an instrument, it allows the escape of fluid from a particular body cavity. Through a blood vessel, it also introduces [..]

thin tube (pop)

(n) a small flexible tube inserted into a body cavity for draining off fluid or introducing medication

  A small tube inserted into the body to allow fluid to enter or escape.

N F reed; small/little/low reed; windpipe (L+S)

A very small, short, soft plastic tube that is inserted into a baby’s vein to give fluids or medicines directly into the bloodstream without having to keep using needles. The cannula has wings that ar [..]

A small plastic tube through which drugs are given into a vein, usually in the arm or hand.

A cannula (plural: cannulae) is a flexible tube which can be inserted into the body either to withdraw fluid or to deliver medication. The most widely known cannulae are used for intravenous delivery [..]

 A soft flexible tube which is inserted into the body, usually into a vein, and through which fluids and medicines can be passed into the body without the need for repeated injections

A thin hollow tube inserted through an incision in order to loosen fat during liposuction.

a hollow tube attached to a high-vacuum device used to remove fat through liposuction. The plastic surgeon manipulates the cannula within the fat layers under the skin, dislodging the fat and “vacuumi [..]

a narrow, flexible tube with prongs used to deliver oxygen into the baby's nose. cardiopulmonary resuscitation (CPR):

A tube put into the body to give or drain off fluid. It usually means a fine tube that goes into a vein.

A plastic tube inserted into a narrow opening (usually a vein) so that fluids can be introduced or removed.