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.
Privacy Push Pin/Button Lock. Push pin or button privacy locks have a push pin/button on the rosette of the door knob or lever. To lock, just push the pin or button in and it will lock it in place. These types of privacy locks have what they call a panic release which means that to unlock the lock all you have to do is turn the lever or knob from the inside and it will release the pin or button and unlock the door.