amniocentesis
‘diagnostic technique involving the withdrawing of amniotic fluid by hypodermic needle’
Lexical development traced from the Tamil root:
E. amniocentesis < Mod.Lat. amnion + centesis ‘surgical puncture involving a puncture’ < Gk. kentesis ‘a pricking’ < kentein ‘to prick’ < sent < kent- < Tamil kaṇṭam