English
acephaline
From a- + cephaline.
Proto-Indo-European *uds- ‘up, out’
Proto-Germanic *uz- ‘out-’
Proto-West Germanic *uʀ- ‘up, out, over’
English a-
Today it means
adj lacking a head-like section in the upper body.
Language periods are conventional ranges, not dates for this word.
Etymograph / acephaline