dilatation
noun/ˌdaɪləˈteɪʃn/, /ˌdɪləˈteɪʃn/
/ˌdaɪləˈteɪʃn/, /ˌdɪləˈteɪʃn/
[uncountable] (medical)- the process of becoming wider (= of becoming dilated), or the action of making something become widerWord Originlate Middle English: via Old French from late Latin dilatatio(n-), from the verb dilatare ‘spread out’, from di- ‘apart’ + latus ‘wide’.
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dilatation