hiˈmad.əkrə̇t, -ˌkrit noun
( -s )
Etymology: International Scientific Vocabulary hemat- + -crit (from Greek kritēs judge) — more at criterion
1. : an instrument for determining the relative amounts of plasma and corpuscles in blood usually by means of centrifugation
2. or hematocrit value : a percentile ratio of volume of packed red blood cells to volume of whole blood centrifuged by a hematocrit