- dilation - a lengthy discussion (spoken or written) on a particular topic
--1 is a kind of discussion, treatment, discourse
Derived form: verb dilate2 - dilation, dilatation - the act of expanding an aperture; "the dilation of the pupil of the eye"
--2 is a kind of expansion, enlargement
--2 has particulars: vasodilation; mydriasisDerived form: verb dilate1