eye-bright: A genus of the angiospermia order, belonging to the didynamia clas of plants; and in the natural method ranking under the 40th order, Peronate. The calyx is quadrifid and cylindrical; the capsule bilocular, ovato-oblong; the shorter two antheræ, with the base of the one lobe terminated by a small spine. There are seven species; two of which, viz. the officinalis and odontites, are natives of Britain. The first of these, which hath blue flowers, is a weak astringent, and was formerly much celebrated in disorders of the eyes; but the present practice hath not only disregarded its internal, but also its external, use. This plant will not grow but when surrounded by others taller than itself. Cows, horses, goats, and sheep, eat it; swine refuse it.