austenite
noun
aus·ten·ite ˈȯ-stə-ˌnīt 
ˈä-
: a solid solution in iron of carbon and sometimes other solutes that occurs as a constituent of steel under certain conditions
austenitic
ˌȯ-stə-ˈni-tik
adjective ˌä-
Word History
Etymology
French, from Sir W. C. Roberts-Austen †1902 English metallurgist
First Known Use
1896, in the meaning defined above