hippolithn.

1659 T. Bateson tr. J. Schröder Ζωολογια i. xxi. 38 The stone (called Hippolithus) [L. Lapis (Hippolithus)] found in the ventricle or bowels of some horses, as it is like to the Occidental Bezoar in figure and structure, so in vertues.

1661 R. Lovell Πανζωορυκτολογια, sive Panzoologicomineralogia 81 The stone found in the stomack, called hippolithus.

1705 tr. B. Ramazzini Treat. Dis. Tradesmen xxiv. 164 And Authors are very large upon the Vertues of the Stones of Horses, which they call Hippoliti [L. Hippolitos], but with what Justice I shall not here determine.

1739 J. K'Eogh Zoologia Medicinalis Hibernica 56 The hippolithus, or stone, found in the viscera, or stomach of a horse, is said to have all the virtues of bezoar.

1844 Western Jrnl. Med. & Surg. 1 132 Pereira mentions one of these hippolithi in his possession consisting of the ammoniacal phosphate of magnesia, which weighs between five and six pounds.

1856 R. G. Mayne Expos. Lexicon Med. Sci. (1860) 438/2 Hippolithus, term for a concretion in the gall-bladder, or intestines of the horse; the Bezoar equinum: a hippolith.

1910 C. de L. Evans How to Prolong Life 128 His [sc. the horse] food contains so much earthy matter that concretions (hippolithi) of phosphates of lime, magnesia, and ammonium, in the cæcum are of very common occurrence.

1975 A. E. Gunther Cent. Zool. Brit. Mus. ii. xix. 257 (note) Present day pharmacists will smile at several of the materia medica obtained from mammals which were still considered potent..during Gunther's boyhood: castorem from the beaver, Ebur ustum nigrum or calcined ivory from elephant or hippopotamus,..and hippoliths from the horse.