Meaning of DILATATION in English

DILATATION

[ ˌdʌɪleɪ'teɪʃ(ə)n , ˌdɪ- , -lə- ]

■ noun chiefly Medicine & Physiology the action of dilating a vessel or opening or the process of becoming dilated.

↘a dilated part of a hollow organ or vessel.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.