One of the mysteries of the English language finally explained.
Definition of magnetoelastic in English:
magnetoelastic
adjective
PhysicsOf, relating to, or involving the interaction of elastic materials and magnetic fields; specifically relating to the interaction between the elastic properties or the state of strain of a solid on the one hand, and its magnetization or magnetic properties on the other.
Origin
Late 19th century; earliest use found in Isaac Todhunter (1820–1884), mathematician and historian of mathematics. From magneto- + elastic.