microchip vs DNA chip

microchip and DNA chip both are nouns.

Word	Noun	Adjective	Verb	Adverb
microchip	Yes	No	No	No
DNA chip	Yes	No	No	No

As nouns, DNA chip is a hyponym of microchip; that is, DNA chip is a word with a more specific, narrower meaning than microchip:

microchip: electronic equipment consisting of a small crystal of a silicon semiconductor fabricated to carry out a number of electronic functions in an integrated circuit
DNA chip: a microchip that holds DNA probes that form half of the DNA double helix and can recognize DNA from samples being tested

Other hyponyms of microchip include biochip, gene chip, memory chip, microprocessor.

microchip (noun)	DNA chip (noun)
electronic equipment consisting of a small crystal of a silicon semiconductor fabricated to carry out a number of electronic functions in an integrated circuit	a microchip that holds DNA probes that form half of the DNA double helix and can recognize DNA from samples being tested