vasorelaxation

antonym: vasoconstriction
synonyms: vasodilatation, vasodilation
https://doi.org/10.1351/goldbook.12160
Increase in the diameter of the lumen of the blood vessels as a result of relaxation of smooth muscles in the vessel walls.
Note: This results in a decrease in vascular resistance followed by a decrease of blood pressure.
Source:
PAC, 2015, 87, 841. (IUPAC Glossary of terms used in neurotoxicology (IUPAC Recommendations 2015)) on page 915 [Terms] [Paper]