unguis, is (abl. ungui, Cat. 62, 43; Hor. Ep. 1, 19, 46; id. C. 2, 8, 4; Prop. 1, 20, 39; cf. Charis. p. 120), m. [cf. Gr. ΟΝΥΧ-, ὄνυξ; Sanscr. nakha], a nail of a person's finger or toe.
I Lit., Plin. 11, 45, 101, § 247; 10, 35, 52, § 106; 28, 2, 5, § 28; Hor. Ep. 1, 7, 51; 1, 19, 46; id. S. 1, 3, 101; Prop. 1, 20, 39; Ov. Am. 1, 7, 64; 2, 6, 4; id. A. A. 3, 708.—
2 Of animals. a claw , talon , hoof , Plin. 11, 45, 101, § 247; Hor. C. 2, 19, 24; Ov. M. 4, 717; 10, 540; Col. 6, 12; Mart. 14, 199 al.—
B Proverbial phrases.
1 Ab imis unguibus usque ad verticem summum, from top to toe , from the crown of his head to the sole of his foot , Cic. Rosc. Com. 7, 20.—
2 A rectā conscientiā transversum unguem non discedere, not to depart a finger's breadth in the least , Cic. Att. 13, 20, 4; cf. ellipt.: urge igitur, nec transversum unguem, quod aiunt, a stilo, id. Fam. 7, 25, 2: si tu ex isto loco digitum transvorsum aut unguem latum excesseris, Plaut. Aul. 1, 1, 17 sq.; Hier. Ep. 127, 8 (v. transversus and digitus).—
3 Cum medium ostenderet unguem, i. e. showed utter derision , the greatest contempt (because the middle finger was regarded as indecent), Juv. 10, 53.—
4 Incestos amores De tenero meditatur ungui, i. e. from childhood , ἐξ ἁπαλῶν ὸνύχων, Hor. C. 3, 6, 24 (for which: a teneris unguiculis, Cic. Fam. 1, 6, 2).—
5 Ad or in unguem, after the Gr. εἰς ὄνυχα or ἐπ ὄνυχος, to a hair , to a nicety , exactly , perfectly (an expression borrowed from sculptors, who, in modelling, give the finishing touch with the nail; or joiners, who test the accuracy of joints in wood by the nail: materiem dolare ad unguem, Col. 11, 2, 13: ad unguem Factus homo, highly polished , perfectly accomplished , Hor. S. 1, 5, 32; cf.: carmen decies castigare ad unguem, id. A. P. 294 Jan. ad loc.: suturae capitis in unguem committuntur, Cels. 8, 1, § 12; Verg. G. 2, 277 Serv.; Vitr. 4, 6, 2; cf. also: carmina molli numero fluere, ut per leve severos effundat junctura unguis, Pers. 1, 65.—
6 Homo, cujus pluris erat unguis, quam tu totus es, a man whose little finger was worth more than your whole body , Petr. 57 fin. —
7 Rodere ungues, to bite the nails , i. e. to be buried in thought , etc.: ille in versu faciendo Saepe caput scaberet vivos et roderet ungues, Hor. S. 1, 10, 71; cf.: ungue meam morso saepe querere fidem. Prop. 3 (4), 25, 4: et saepe inmeritos corrumpas dentibus ungues, id. 2, 4, 3 (13).—
II Transf.
A Of plants, a nail-like spot , the tip , extremity , Plin. 12, 9, 19, § 36; 21, 18, 73, § 121; Col. 4, 24, 7; Pall. Febr. 12, 5.—
B A kind of shell-fish , perh. the razor-fish , Varr. L. L. 5, 12, 23.—
C A hook : ferrei, Col. 12, 18, 2. —
D A white skin on the eye , a web , haw , πτερύγιον, Cels. 7, 7, 4.