(military, World War II, slang) A Katyusha rocket launcher.

(anatomy) One of the circumventricular organs of the brain, located in the posterior region of the third ventricle

plural of subcommissural organ

A hypothetical musical instrument consisting of a line of cats fixed in place with their tails stretched out underneath a keyboard so that they cry out when keys are pressed.

plural of cat organ

a disease present since birth that is not the result of a genetic anomaly

(UK, Canada) A student at a university, school or church who receives a stipend or scholarship for being an assistant organist at that institution.

plural of organ scholar

plural of organ loft

The gallery or raised platform within a church or hall from which an organ is played, though not necessarily housing the organ itself.