a condition in which the eyelid is rolled inward against the eyeball, typically caused by muscle spasm or by inflammation or scarring of the conjunctiva (as in diseases such as trachoma), and resulting in irritation of the eye by the lashes (trichiasis).
Origin:
late 19th century: from en-2 'inside', on the pattern of ectropion
entropion in other Oxford dictionaries
Definition of entropion in the US English dictionary
