ἡμί-φωνος · hēmi-phōnos — LSJ
half-pronounced
half-pronounced, λέξις Aristaenet. 1.10.
2 a semi-vowel
Subst. ἡμίφωνον, τό, a semi-vowel, as ρ ς, Arist. Po. 1456b27, Phld. Po. 2.16, D.H. Comp. 14, D.T. 631.16, etc.
II half able to speak, half-vocal
half able to speak, Gal. UP 6.3; half-vocal, of certain signs of the Zodiac, Cat.Cod.Astr. 1.166, Vett.Val. 5.24:—hence ἡμι-φωνία, ἡ, Steph. in Hp. 1.184D.