As it applies to lighting, a connector strip is a sheet-metal wireway for the purpose of distributing power (and sometimes data) to luminaires. Usually 3"deep x 4" high and of unlimited length, they can have either flush-mount receptacles, or pigtails, or occasionally both (as shown below).
SSRC-Products
Usually used interchangeably with raceway.
SSRC-Products
Usually used interchangeably with raceway.