Lewis Short
aemŭlātus (noun M) : Perh. only in Tac. for the class. aemulatio
* Emulation, rivalry, Hist. 3, 66.—In plur., Ann. 13, 46. (But in Agr. 46, aemulatu is only a conjecture of Heinsius; Orell. and Halm read similitudine).
Charlton T. Lewis, Charles Short, A Latin Dictionary