Definition of injection

The word "injection" has its roots in the Latin word "injicere," which means "to throw into." This Latin term is a combination of "in" (meaning "into") and "jacere" (meaning "to throw"). The concept of injection has been around since ancient times, with evidence of various injection techniques used for medicinal and therapeutic purposes in ancient civilizations such as Egypt, Greece, and Rome. The modern medical term "injection" emerged in the 16th century, and it referred to the act of introducing a substance into the body through a hollow tube or needle. The term gained widespread use in the 19th century with the development of vaccination and the introduction of injectable medications. Today, the word "injection" is used in various contexts, including medicine, biology, and engineering, to describe the process of introducing a substance into a system or cavity.