# latus rectum

> English word · Noun

## Definitions
1. The line drawn through a focus of a conic section parallel to the directrix and terminated both ways by the curve. It is the parameter of the principal axis.

## Etymology
Latin latus (“side”) + rectum (“right”)

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