gyrus vs parietal gyrus

gyrus and parietal gyrus both are nouns.

Word	Noun	Adjective	Verb	Adverb
gyrus	Yes	No	No	No
parietal gyrus	Yes	No	No	No

As nouns, parietal gyrus is a hyponym of gyrus; that is, parietal gyrus is a word with a more specific, narrower meaning than gyrus:

gyrus: a convex fold or elevation in the surface of the brain
parietal gyrus: any of the convolutions of the outer surface of the parietal lobe of the cerebrum

Other hyponyms of gyrus include frontal gyrus, temporal gyrus, occipital gyrus, central gyrus.

gyrus (noun)	parietal gyrus (noun)
a convex fold or elevation in the surface of the brain	any of the convolutions of the outer surface of the parietal lobe of the cerebrum