One of the mysteries of the English language finally explained.
Originally: a preparation supposedly derived from cultures of Mycobacterium leprae, used in attempts to treat and prevent leprosy (now historical). In later use: any of several preparations containing proteins of M. leprae, used in skin testing for the classification of cases of leprosy.
Early 20th century. From lepro- + -lin.
In this article we explore how to impress employers with a spot-on CV.