IPA: //ˈtɛtrəkeɪn//
KK: /ˈtɛtrəˌkeɪn/
A chemical compound used as a local anesthetic to numb specific areas of the body during medical procedures.
The doctor applied tetracaine to the patient's skin before the minor surgery to ensure they wouldn't feel any pain.
Tetracaine is formed from "tetra-" (meaning four) and "cain" (derived from the chemical suffix used in local anesthetics, related to cocaine). The word refers to a local anesthetic that is a derivative of cocaine and has four carbon atoms in its structure.
Think of 'four' ('tetra-') in the name, which helps you remember that tetracaine is a type of anesthetic related to cocaine.