Vitamin A deficiency: Related Medical Conditions. To research the causes of Vitamin A deficiency, consider researching the causes of these these diseases that may be similar, or associated with Vitamin A deficiency:
Definition of push button. : a small button or knob that when pushed operates something especially by closing an electric circuit.
1. to press against (a thing) with force in order to move it away. 2. to move (something) in a specified way by exerting force: to push the door open. 3. to accomplish by pushing: to push one's way through a crowd. 4. to cause to extend or project; thrust.