English
acephalism
From a- + cephal- + -ism.
Formed from a- + cephal- + -ism
Proto-Indo-European *uds- ‘up, out’
Proto-Germanic *uz- ‘out-’
Proto-West Germanic *uʀ- ‘up, out, over’
English a-
Today it means
noun The congenital lack of a head.
Language periods are conventional ranges, not dates for this word.
Etymograph / acephalism