Shrinking Charm

The Shrinking Charm. (Reducio ) is a charm that enables a witch or wizard to decrease the apparent physical size of the target, both internally and externally. It also can act as the counter-spell for the Engorgement Charm, causing the Engorged object to return to its original size.

Practitioners

 * Arthur Weasley
 * Bartemius Crouch Jr.
 * Harry Potter
 * Poppy Pomfrey

Etymology
The incantation is a Latin word meaning "to reduce" or "is reducable", fitting for this spell's effects.

Behind the scenes

 * In Harry Potter and the Deathly Hallows: Part 1 the scene in which the spider is enlarged is replaced by a mirror scene including Bluebell Flames.
 * The effects of this charm bear great similarity to those induced by the incantation of Diminuendo, used by Nigel Wolpert in 1995.

Appearances

 * Harry Potter and the Philosopher's Stone
 * Harry Potter and the Goblet of Fire
 * Harry Potter and the Deathly Hallows
 * Harry Potter and the Deathly Hallows: Part 1
 * Wonderbook: Book of Spells

Notes and references
sortilège de Ratatinage Paluus