variants:
or less commonly autoinjector
Definition of auto-injector
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
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Merriam-Webster unabridged
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Time Traveler for auto-injector
The first known use of auto-injector was in 1905
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