auto-injector

noun

au·​to-in·​ject·​or ˌȯ-tō-in-ˈjek-tər 

variants or less commonly autoinjector

medical

: a device for injecting oneself with a single, preloaded dose of a drug that typically consists of a spring-loaded syringe activated when the device is pushed firmly against the body

Examples of auto-injector in a Sentence

Recent Examples on the Web

Amazon also offers injectable weight loss medication, including Wegovy injectables, Zepbound auto-injector and KwikPen, with cash-pay pricing starting at $299 per month. —Boston Herald Wire Services, Boston Herald, 22 Apr. 2026

Wegovy injectables, the Zepbound auto-injector and the KwikPen injectable begin at $299 per month with cash-pay pricing. —Adam England, PEOPLE, 22 Apr. 2026

People should also be cautious while near logs, rotting wood, and rocks, where the ants can be located People with known allergens or sensitivities to insect venom can also choose to carry an epinephrine auto-injector, an EpiPen, according to the Forest Service. —Julia Gomez, USA Today, 9 Apr. 2026

Currently, patients on the treatment use a different single-dose auto-injector device each week. —Annika Kim Constantino, CNBC, 23 Feb. 2026

The Wegovy pill contains semaglutide, the same active ingredient used in the Wegovy shot, which comes in an auto-injector pen. —Sean Hashmi, EverydayHealth.com, 16 Jan. 2026

Epinephrine auto-injectors for anaphylaxis, in adult and pediatric dosages. —Tushara Surapaneni, Chicago Tribune, 4 Jan. 2026

The cost of auto-injectors can range from $100 to $700, according to Nissa Shaffi, director of advocacy at the Allergy & Asthma Network, which supports the bill. —David Lightman, Sacbee.com, 24 Sep. 2025

If someone has ever experienced symptoms beyond swelling, such as breathing issues or widespread hives, Kopelman recommended carrying an epinephrine auto-injector and consulting an allergist about venom immunotherapy. —Lydia Patrick, MSNBC Newsweek, 22 Aug. 2025

Word History

Etymology

auto- + injector

First Known Use

1905, in the meaning defined above

Rhymes for auto-injector

• photodetector
• bisector
• collector
• connector
• corrector
• defector
• deflector
• detector
• director
• dissector
• effector
• ejector

Medical Definition

auto-injector

noun

au·​to-in·​ject·​or ˌȯ-(ˌ)tō-ˌin-ˈjek-tər 

variants also autoinjector

: a device for injecting oneself with a single, preloaded dose of a drug that typically consists of a spring-loaded syringe activated when the device is pushed firmly against the body

Some parents and health officials say epinephrine auto-injectors should be as common in schools as defibrillators are, so immediate help would be available to any student suffering anaphylaxis …

—Noreen S. Ahmed-Ullah, The Chicago Tribune