cytologic specimen vs specimen

cytologic specimen and specimen both are nouns.

Word	Noun	Adjective	Verb	Adverb
cytologic specimen	Yes	No	No	No
specimen	Yes	No	No	No

As nouns, specimen is a hypernym of cytologic specimen; that is, specimen is a word with a broader meaning than cytologic specimen:

cytologic specimen: a specimen used for cytologic examination and diagnosis
specimen: a bit of tissue or blood or urine that is taken for diagnostic purposes

cytologic specimen (noun)	specimen (noun)
a specimen used for cytologic examination and diagnosis	a bit of tissue or blood or urine that is taken for diagnostic purposes
	an example regarded as typical of its class