Form-chairs were universally known as chairs that adapted their shape to the unique body shape of whoever sat in them.
During the Clone Wars, Klo Merit kept a form-chair in his workspace at RMSU-7. Form-chairs were standard equipment on the first Death Star, and Xizor owned a form-chair that was upholstered with cloned leather and contained a malfunctioning voxchip that couldn't correctly say his name.
Following the Lost Tribe of Sith emergence event in 44 ABY, Lando Calrissian suggested that the Millennium Falcon be outfitted with form-chairs, replacing the previous chairs that were destroyed by a thermal detonator thrown by Sith apprentice Vestara Khai during the Assault on the New Jedi Temple.