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.
The expression to push the envelope comes from an ancient ritual first practised when aspiring home builders/developers emerged from the caves. It involved the aspirational party pushing a pagan offering, shrouded in brown parchment, across an imaginary desk to a local government planning official. Ken Grant, Sunshine Coast.