'angiocyst' originates from Greek, specifically the words 'angeion' meaning 'vessel' and 'kystis' meaning 'bladder' or 'cyst'.

'angeion' and 'kystis' combined in scientific Latin to form 'angiocyst', which was then adopted into modern English medical terminology.

Initially, it meant 'a vessel bladder or cyst', and over time it evolved into its current meaning of 'a cyst or sac formed by or containing blood vessels'.