an ‧ al ‧ ge ‧ si ‧ a /ˌæn ə lˈdʒiːziə $ -ʒə/ BrE AmE noun [uncountable]
[ Date: 1700-1800 ; Language: Modern Latin ; Origin: Greek , from an- 'without' + algesis 'sense of pain' (from algos 'pain' ) ]
technical the condition of being unable to feel pain while conscious