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m. [Ulf. gads = κέντρον, 1 Cor. xv. 55, 56; A. S. gadu; Engl. gad, goad; Swed. gadd]:—a goad, spike, Str. 77, Gísl. 159 (on a sword’s hilt); gadda-kylfa, u, f. a ‘gad-club,’ club with spikes, Fms. iii. 329; gadd-hjalt, n. a ‘gad-hilt,’ hilt studded with nails, Eb. 36 new Ed., Gísl. 159, Fas. iii. 288, cp. Worsaae 494, 495, as compared with 330: metaph. phrase, var mjök í gadda slegit, ‘twas all but fixed with nails, i. e. settled, Nj. 280.
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II. a sting, Al. 168; (cp. Engl. gad-fly.)
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III. perhaps a different root, hard snow, also spelt galdr (Fms. viii. 413, v. l., cp. gald, Ivar Aasen); the phrase, troða gadd, to tread the snow down hard, Fms. vii. 324, viii. 413, ix. 364, 490; en er Birkibeinar vóru komnir upp á galdinn hjá þeim, Fb. ii. 688: even used as neut., gaddit, Fms. viii. l. c. (in a vellum MS.); gaddit. id. (also vellum MS.); hence gadd-frosinn, part. hard-frozen; gadd-hestr, m. a jade turned out in the snow.
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IV. a ‘gad-tooth,’ a disease in cattle, one or more grinders growing out so as to prevent the animal from feeding, described in Fél. xiv. note 250; gadd-jaxl, m. a ‘gad-grinder.’