LSJ
ατος, τό, = ἡμίσευμα, Supp.Epigr. 2.705.29 (Perga, perh. i AD).
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
TBESG
half
Translators Brief lexicon of Extended Strongs for Greek based on Abbot-Smith, A Manual Greek Lexicon of the New Testament (1922) (=AS), with corrections and adapted by Tyndale Scholars