Meaning of CAUSAL in English
/ ˈkɔːzl; NAmE / adjective
( formal ) connected with the relationship between two things, where one causes the other to happen :
the causal relationship between poverty and disease
causal conjunction / connective ( grammar ) a word such as because that introduces a statement about the cause of sth
late Middle English (as a noun denoting a causal conjunction or particle): from late Latin causalis , from Latin causa cause.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005