And Chalazia, (from hail atones; grandma lupae). This name is given to a white knotty string at each end of an egg, formed of a plexus of the fibres of the membranes, by which the yolk and the white are connected: it is sometimes called aryuatum.

It is also a species of the hordeolum. Stye, stian, or stithe, a moveable, hard, white, encysted tumour on the margin of the eye lid, resembling a hail stone; and differs from the crithe, another species, only in being moveable. It continues long, and proceeds slowly, and is often merely an enlargement of one of the sebaceous glands in consequence of obstruction; but occasionally of a more solid consistence. Sometimes it may be dispersed with the unguentum coeru-leum fortius, and with a few roses of calomel. If they fail to relieve, make an incision through the skin which covers them, and dissect the tumour clearly out, or touch the skin over them with caustic, until the whole is wasted. See St. Yves on the Disorders of the Eye. Bell's Surgery, vol. iii. p. 264. Nos. Meth. Ocul. of Dr. Wallis, p. 4.