[L. ungula claw, hoof, f. unguis nail, UNGUIS.]
† 1. = ONYCHA, ONYX 2. Obs.
1382. Wyclif, Ecclus. xxiv. 21 [15]. Galban, and vngula, and gutta [1388 vngula, and gumme].
† 2. A morbid growth in the eye; = ONYX 3, PTERYGIUM 2 a. Obs.
c. 1400. Lanfranc’s Cirurg., 19. Vngula is a þing, þat bigynneþ bi þe nose & goiþ over þe iȝe til be keuere al þe iȝe.
1597. A. M., trans. Guillemeau’s Fr. Chirurg., c ij b/1. When we desire to cut of[f] an Vngula. Ibid., c ij b/2. An Eye, in the which is an Vngula.
1693. trans. Blancard’s Phys. Dict. (ed. 2), Pterygium,… a membranous Excrescence above the horny Tunic of the Eye, called Unguis and Ungula.
† 3. = UNGUIS 3. Obs.–0
1693. trans. Blancard’s Phys. Dict. (ed. 2), Ungula, a sort of hooked Instrument to draw a dead Fœtus out of the Womb.
4. Geom. (See quots.)
1710. J. Harris, Lex. Techn., II. Ungula, in Geometry, is the Section of a Cylinder cut off by a Plane, which passes obliquely thro’ the Plane of the Basse, and part of the Cylindric Surface.
1824–5. Encycl. Metrop. (1845), I. 362/1. A spherical wedge or ungula is that portion of the solid sphere, which is included between the same great semicircles, and has the lune for its base.
1843. Penny Cycl., XXV. 514/2. The hoof of a horse looks like the part of a cone which is separated from the part containing the vertex by an oblique plane. Hence such a solid is called an ungula.
