1. An apparatus for the separation of dry comminuted ore, by exposing it to intermittent puffs of air 
2. A frame or ring of wire or hard paper fitting into the cartridge case used in some shotguns, and holding the shot together when discharged, to secure close shooting; also, a device for slightly narrowing the bore at the muzzle for the same purpose

Derived forms: concentrators

Encyclopedia: Concentrator

• Esq
• get across
• get ahead
• get along
• get along with
• get around
• get around to
• get at
• get back
• get behind
• get by
• get cracking
• get down
• get down to brass tacks
• get dressed
• get even
• get going
• get hitched
• get hitched with
• get hold
• get hold of
• get in
• get in touch
• get into
• get it