feminine singular of the past participle of cacher

(film) candid camera, hidden camera

(literally) the hidden side of a celestial body / (figuratively) the hidden side, the hidden face (of something); the dark side (of something)

(Internet) blind carbon copy (copy of an email message that is sent to a person (often one of many) other than the primary recipient without the express knowledge of the other recipients)

feminine plural of the past participle of cacher