When the end of an idioblast is broken the crystals or other substance is ejected by internal water pressure.

Idioblast can mean:

Crystal idioblast (CI) containing cells are lacking in the palisade layer and protrude into the epidermis.

Idioblast is the first full-length album by multidisciplinary artist John Fekner, recorded and released in 1984 under the name John Fekner City Squad.