# perithelium

> English word · Noun

## Definitions
1. The layer of connective tissue surrounding the capillaries and smaller blood vessels

## Etymology
From peri- + -thelium.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/perithelium