A medical device designed to deliver a single dose of a particular, typically life-saving, drug.(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "autoinjector" in a sentence
"But you must talk with your physician about the autoinjector; you need to ensure it's readily available, on hand, and replaced before its expiration date, or it might not help you when you need it the most."
"With shaking hands, Annie ripped off the gray top of the autoinjector."
"She looked at the autoinjector in her hand, then to her son, then to Nicholas."