microgram 1
/muy"kreuh gram'/ , n.
a unit of mass or weight equal to one millionth of a gram, used chiefly in microchemistry. Symbol: µg Also, esp. Brit., microgramme .
[ 1885-90; MICRO- + -GRAM 2 ]
microgram 2
/muy"kreuh gram'/ , n.
micrograph (def. 2).
[ MICRO- + -GRAM 1 ]