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 British English: keypad The keypad on a telephone or some other machine is the set of buttons that you press in order to operate it. 2  NOUN...an elevator's push-button keypad.ranslations for 'keypad'. 1  British English: keypad The keypad on a telephone or some other machine is the set of buttons that you press in order to operate it. 2  NOUN...an elevator's push-button keypad. 3  Brazilian Portuguese: teclado.