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.
Answer by Paced. Confidence votes 53. Action buttons are ready-made buttons that can be inserted into your presentation. These enable you to perform actions upon clicking or moving the mouse over these buttons. an action button allows you to do certain things like go back on to the homepage of an internet site.