n :  one that monitors : esp  :  a device for observing or measuring a biologically important condition or function <a heart > 
, vt, mon*i*tored  mon*i*tor*ing   1  :  to watch, observe, or check closely or continuously < a patient's vital signs>   2  :  to test for intensity of radiations esp. if due to radioactivity .
 
 
 
Similar sounding terms:  man-eat·er 
 
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