ἔκτομον

English (LSJ)

τό,

   A black hellebore, Hp.Mul.1.78, Thphr.HP9.10.4, Diocl.Fr.151; but, white hellebore, Ps.-Dsc.4.148.    II ἔκτομος (sc. λίθος), ὁ, stone forming interior angle, Rev.Phil.29.240 (Didyma), 49.6 (ibid.).