Terebellum (terebelum)

[A corruption of Gr. τετράπλευρον, a quadrangle (a name applied to this group by Ptolemy), neut. of τετράπλευρος, four-sided, ( τετρα-, four, + πλευρά, side.] A group of four stars, in the form of a quadrilateral, at the root of the tail of Sag it tar i us. terebene (ter'e-ben), n. [ terebic (te-reb'ik), a. [ Terebic acid, C7H1004, a monobasic acid, a product of the action of nitric acid on turpentine-oil. Also called turpentinic, terebilic, and terebinic acid.