English
hydroacoustics
From hydro- + acoustics.
A compound of hydro- + acoustic + acoustics
Proto-Indo-European *h₂ew- ‘to enjoy’
Proto-Indo-European *h₂ṓws ‘ear’
Proto-Indo-European *h₂ḱh₂owsyéti ‘to be sharp-eared, to hear well’
Proto-Hellenic *akóuhō ‘to hear’
Ancient Greek ἀκούω ‘to hear’
Ancient Greek ᾰ̓κουστῐκός ‘of or for hearing’
Medieval Latin acousticus
English acoustic
Proto-Indo-European *h₂ew- ‘to enjoy’
Proto-Indo-European *h₂ṓws ‘ear’
Proto-Indo-European *h₂ḱh₂owsyéti ‘to be sharp-eared, to hear well’
Proto-Hellenic *akóuhō ‘to hear’
Ancient Greek ἀκούω ‘to hear’
Ancient Greek ᾰ̓κουστῐκός ‘of or for hearing’
Medieval Latin acousticus
English acoustic
English acoustics
Today it means
noun Any of various sciences and technologies dealing with sound transmitted through water.
Language periods are conventional ranges, not dates for this word.
Etymograph / hydroacoustics