histone vs core histone

histone and core histone both are nouns.

Word	Noun	Adjective	Verb	Adverb
histone	Yes	No	No	No
core histone	Yes	No	No	No

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

histone: a simple protein containing mainly basic amino acids; present in cell nuclei in association with nucleic acids
core histone: simple proteins that bind to nucleosomes (histones H2A, H2B, H3 and H4).

Other hyponyms of histone include linker histone.

histone (noun)	core histone (noun)
a simple protein containing mainly basic amino acids; present in cell nuclei in association with nucleic acids	simple proteins that bind to nucleosomes (histones H2A, H2B, H3 and H4).