zoological science vs disjunct

zoological science is a noun but disjunct is not a noun.

Word	Noun	Adjective	Verb	Adverb
zoological science	Yes	No	No	No
disjunct	No	Yes	No	No

zoological science (noun)	disjunct (noun)
the branch of biology that studies animals

zoological science (adjective)	disjunct (adjective)
	progressing melodically by intervals larger than a major second
	used of distributions, as of statistical or natural populations
	having deep constrictions separating head, thorax, and abdomen, as in insects
	marked by separation of or from usually contiguous elements