# truncus arteriosus

> English word · Noun

## Definitions
1. The single arterial outlet in the embryological heart which later divides into the aorta and the pulmonary trunk.
2. Ellipsis of persistent truncus arteriosus.

## Etymology
Borrowed from Latin truncus arteriosus (literally “arterial trunk”).

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