ἀνεγκέφαλος
From LSJ
λίγεια μινύρεται θαμίζουσα μάλιστ' ἀηδών → the sweet-voiced nightingale mourns constantly, the sweet-voiced nightingale most loves to warble
English (LSJ)
ον,
A without brain, Gal.5.314.
Greek (Liddell-Scott)
ἀνεγκέφαλος: -ον, ὁ ἐγκέφαλον μὴ ἔχων, Γαλην. τόμ. 5, σ. 119.