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.
button noun [C] (ON MACHINE). B1 a âsmall, sometimes âcircular âobject that you âpress to âoperate a âdevice or a âmachine, or an âarea on a âcomputer âscreen that âlooks and âacts like one of these: He âinserted the âdisk and âpressed the âplay button.