Vasodilatations

Part of speech: noun

Definitions

1. The process of the widening of blood vessels, allowing increased blood flow to tissues
2. A physiological response involving the relaxation of vascular smooth muscle, resulting in expanded vessel diameter
3. An increase in the internal diameter of blood vessels, typically to enhance circulation and decrease blood pressure

Etymology: "Vasodilatations" is the plural of "vasodilatation", a medical term for the widening of blood vessels. It is formed from "vaso-", a combining form from Latin "vas" meaning "vessel" or "container", and "dilatation", the widening or expansion of something, from Latin "dilatare" meaning "to spread out" or "enlarge." Put together, the compound describes exactly what happens: a vessel expanding in diameter. The plural form follows the pattern of Latin-derived nouns ending in "-ation," which take an "s" in English to count multiple instances, so doctors can speak of several vasodilatations in different parts of the body. The word is a technical coinage built from classical elements rather than an ancient term, and it belongs to the modern scientific vocabulary of physiology.