printing key frame
now historical
noun
A typewriter for producing embossed type, designed for use by blind people.
- The device was patented by Pierre Foucault in 1849 and was exhibited in London at the Great Exhibition of 1851..
Origin
Mid 19th century.
- electrochromatographic
- electrochromatography
- electrochromic
- electrochromism
- electro-chronograph
- electrocoagulation
- electrocoat
- electrocoating
- electroconductivity
- electro-contact
- electroconvulsive
- electrocopper
- electrocoppered
- electrocoppering
- electrocortical
- electrocorticogram
- electrocortin
- electroculture
- electrocute
- electrocution
- electrocyclic
- electrocyte
- electrode
- electrodeless
- electrodeposit