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Causing dilation or relaxation of the blood vessels; as, the vasodilator nerves, stimulation of which causes dilation of the blood vessels to which they go. These nerves are also called vaso- inhibitory, and vasohypotonic nerves, since their stimulation causes relaxation and rest.

and to narrow as used by Mr. Sweet. The effect, as explained by Mr. Bell, is due to the relaxation or tension of the pharynx; as explained by Mr. Sweet and others, it is due to the action of the tongue. The wide of e (eve) is î (îll); of a (ate) is ê (ênd), etc. See Guide to Pronunciation, § 13-15.