Meaning of DILATATION in English

DILATATION

/ ˌdaɪləˈteɪʃn; NAmE ; ˌdɪlə-; BrE also ˌdaɪleɪ-/ noun

[ U ] ( medical ) the process of becoming wider (= of becoming dilated ), or the action of making sth become wider

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WORD ORIGIN

late Middle English : via Old French from late Latin dilatatio(n-) , from the verb dilatare spread out, from di- apart + latus wide.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.