unit of force, 1904, named in honor of Sir Isaac Newton (1642-1727). Related: Newtonian.
in reference to the polio vaccine, 1955, from name of Russian-born U.S. microbiologist Albert B. Sabin (1906-1993), who developed it. As a unit of sound absorption by 1934, for U.S. physicist Wallace C. Sabine (1868-1919), founder of architectural acoustics.
Not a separate constellation in ancient Greece, where it was khelae, "the claws" of adjacent Skorpios. Nativized in Old Norse as skala-merki. Meaning "person born under the sign of Libra" is from 1894. Related: Libral; Libran.