Meanings

hyperactivity

behavior (esp. in response to an emergency, medical situation, etc.)

hyperactivity

brachiopod

guidelines for action

vertebral artery

Tea Party movement (USA)

autonomic ataxia

motorcycle (with a displacement of 50cc or more)

license plate for registered vehicles (i.e. compact car or larger)

automobile engine

standard-sized automobile

automatism

automobile mechanic

automatic lock

registered vehicle (i.e. compact car or larger)

automotive engineering

automaticity

vasoactive substances

automatic pistol