Definition

A flexible tube used in medicine to enter a body cavity or vessel, allowing fluids to flow in or out, such as draining urine or delivering medication.

Example

The doctor inserted a catheter to help drain the patient's bladder.

Conversation

I heard you had to get a catheter at the hospital.

Yeah, it was a bit uncomfortable but necessary.

I can imagine! What was it for, if you don’t mind me asking?

It was for some tests, but thankfully everything turned out fine.

Synonyms & Antonyms

Root Explanation

Catheter → It is derived from the Greek word "katheteres" (meaning to send down or to let down), which comes from "kata-" (meaning down) and "hienai" (meaning to send). The word "catheter" refers to a tube that is sent down into the body to allow for the passage of fluids or instruments.

Memory Tip

Think of a tube that is 'sent down' ('kata-') into the body to help with medical procedures — that's why a catheter is used to let fluids flow.

Visually Confused Words