Dictionary.com
definitions

econometrics

[ih-kon-uh-me-triks]
noun (used with a singular verb) Economics.
  1. the application of statistical and mathematical techniques in solving problems as well as in testing and demonstrating theories.

Origin of econometrics

First recorded in 1930–35; see origin at economy, metric2, -ics
Related formse·con·o·met·ric, e·con·o·met·ri·cal, adjectivee·con·o·me·tri·cian [ih-kon-uh-mi-trish-uh n] /ɪˌkɒn ə mɪˈtrɪʃ ən/, e·con·o·met·rist, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for econometrics

econometrics

noun
  1. (functioning as singular) the application of mathematical and statistical techniques to economic problems and theories
Derived Formseconometric or econometrical, adjectiveeconometrist (ˌiːkəˈnɒmətrɪst), noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012