meat vs dark meat

meat and dark meat both are nouns.

Word	Noun	Adjective	Verb	Adverb
meat	Yes	No	No	No
dark meat	Yes	No	No	No

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

meat: the flesh of animals (including fishes and birds and snails) used as food
dark meat: the flesh of the legs of fowl used as food

meat (noun)	dark meat (noun)
the choicest or most essential or most vital part of some idea or experience	the flesh of the legs of fowl used as food
the flesh of animals (including fishes and birds and snails) used as food
the inner and usually edible part of a seed or grain or nut or fruit stone