powerhead

noun

• 1 informal a powerful egomaniac:record-industry powerheads

• 2any of various mechanical or electrical devices, including.
• a submersible pump for an aquarium that creates current within a tank.
• a vacuum-cleaner attachment that houses an independent motor that drives a carpet-beating rotating brush. See also beater bar.
• the internal combustion engine of an outboard motor.
• the power unit of an automatic garage door opener.