In French, "œ" is called ' , which means "e in the o" (a mnemotechnic pun used first at school, sounding like ', meaning "eggs in water") or sometimes ', (literally "o and e glued") and is a true linguistic ligature, not just a typographic one (like the "fi" or "fl" ligatures), reflecting etymology. It is most prominent in the words ' ("mores"), ' ("heart"), ' ("sister"), ' ("egg"), ' ("beef", "steer"), ' ("work") and ' ("eye"), in which the digraph "œu", like "eu", represents the sound (in other cases, like plurals ' ("eggs") and ' ("steers"), it stands for ).