n 1  :  a medial part (as a vein or nerve)  2 a  :  a value in an ordered set of values below and above which there is an equal number of values or which is the arithmetic mean of the two middle values if there is no one middle number  b  :  a vertical line that divides the histogram of a frequency distribution into two parts of equal area
adj :  situated in the middle : specif  :  lying in a plane dividing a bilateral animal into right and left halves .
 
 
 
Similar sounding terms:  mu·ton 
 
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