[L. exta in same sense.] See quot. 1884; spec. (Antiq.) the entrails of a victim from which auguries were taken by soothsayers.
1663. J. Spencer, Prophecies (1665), 23. Diviners by the Smoke, the Exta, the Incense on the Altar.
17306. in Bailey (folio).
1855. Smedley, Occult Sciences, 152. None of the exta, however favourable they might have been, were of the slightest avail.
1884. Syd. Soc. Lex., Exta, the viscera of the chest, originally. Also, occasionally used for the abdominal viscera, especially the bowels.