asdic vs measuring device

asdic and measuring device both are nouns.

Word	Noun	Adjective	Verb	Adverb
asdic	Yes	No	No	No
measuring device	Yes	No	No	No

As nouns, measuring device is a hypernym of asdic; that is, measuring device is a word with a broader meaning than asdic:

asdic: a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return
measuring device: instrument that shows the extent or amount or quantity or degree of something

Other hypernyms of asdic include measuring instrument, measuring system, navigational instrument.

asdic (noun)	measuring device (noun)
a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return	instrument that shows the extent or amount or quantity or degree of something