The twenty-fourth letter of the French alphabet, written in the Latin script.

Used to form the regular plurals of nouns and adjectives in -au and -eu. / Used to form the irregular plurals of a few nouns in -ou (which regularly add -s).

X-rated

The twenty-fourth letter of the French alphabet, called ixe and written in the Latin script. / X-frame stool

(informal) an X-rated movie, an adult movie, a blue movie, a porn movie, a skin flick, a porno

X-ray

plural of rayon X

(photography) 35 mm SLR