hematocrit vs measuring device

hematocrit and measuring device both are nouns.

Word	Noun	Adjective	Verb	Adverb
hematocrit	Yes	No	No	No
measuring device	Yes	No	No	No

As nouns, measuring device is a hypernym of hematocrit; that is, measuring device is a word with a broader meaning than hematocrit:

hematocrit: a measuring instrument to determine (usually by centrifugation) the relative amounts of corpuscles and plasma in the blood
measuring device: instrument that shows the extent or amount or quantity or degree of something

Other hypernyms of hematocrit include centrifuge, extractor, separator, measuring instrument, measuring system.

hematocrit (noun)	measuring device (noun)
a measuring instrument to determine (usually by centrifugation) the relative amounts of corpuscles and plasma in the blood	instrument that shows the extent or amount or quantity or degree of something
the ratio of the volume occupied by packed red blood cells to the volume of the whole blood as measured by a hematocrit