# idoneal

> English word · Adjective

## Definitions
1. Belonging to the set of positive integers that cannot be expressed as ab + bc + ac for distinct positive integers a, b, and c.

## Etymology
From Latin numerus idoneus.

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