(rare) A recondite (hidden or obscure) person or thing. / (rare) A scholar or other person who is recondite, that is, who has mastery over his or her field, including its esoteric minutiae.

plural of optic disc

The amount that fits in a cabin.

(uncountable, medicine, informal) Clipping of endocrinology. / (countable, medicine, informal) Clipping of endocrinologist. / (uncountable, medicine, informal) Clipping of endometriosis.