autoinjector: a hypodermic syringe to use in injecting yourself with a liquid
hypodermic syringe: a piston syringe that is fitted with a hypodermic needle for giving injections
wood rat: any of various small short-tailed rodents of the northern hemisphere having soft fur grey above and white below with furred tails and large ears; some are hosts for Ixodes pacificus and Ixodes scapularis (Lyme disease ticks)