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.
push. 1  to exert pressure or force against, esp. so as to move. to move in this way. 2  to urge on; impel; press. to follow up vigorously; promote (a campaign, claim, etc.) to extend or expand (business activities, etc.) 3  to bring into a critical state; esp., to make critically in need: to be pushed for time.