Available Definitions:
1) a. - Hard; firm; indurated; -- applied especially in anatomy to the firm outer coat of the eyeball, which is often cartilaginous and sometimes bony.
2) a. - Of or pertaining to the sclerotic coat of the eye; sclerotical.
3) a. - Affected with sclerosis; sclerosed.
4) n. - The sclerotic coat of the eye. See Illust . of Eye (d).
5) a. - Pertaining to, or designating, an acid obtained from ergot or the sclerotium of a fungus growing on rye.