Bayesian

adjective

Bayes·​ian ˈbā-zē-ən 

-zhən

: being, relating to, or involving statistical methods that assign probabilities or distributions to events (such as rain tomorrow) or parameters (such as a population mean) based on experience or best guesses before experimentation and data collection and that apply Bayes' theorem to revise the probabilities and distributions after obtaining experimental data

Word History

First Known Use

1950, in the meaning defined above