ptĕrygĭum, ĭi, n., = πτερύγιον.
I A film that grows over the eye , a pearl , web , or haw , Cels. 7, 7, 4; Plin. 32, 7, 24, § 72; 34, 10, 23, § 105.—
II A growth of flesh over the nails , Plin. 24, 4, 5, § 9; 26, 5, 14, § 26; 27, 4, 5, § 20; 30, 12, 37, § 111; cf. Cels. 6, 19, 1.—
III A cloudy spot in the beryl , Plin. 37, 5, 20, § 79.