cancrum oris

The story

1. Latin · derived fromcancrum ōris
2. English todaycancrum oris

From Latin cancrum ōris, from cancrum (“canker”) and ōris (“of the mouth, face”), genitive singular of ōs (“mouth, face”). The Latin phrase itself is first attested in a source that gives it as a translation of an English common name "mouth canker" or "canker of the mouth".