Blinker

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Blink"er (?), n.

1.

One who, or that which, blinks.

2.

A blinder for horses; a flap of leather on a horse's bridle to prevent him from seeing objects as his side hence, whatever obstructs sight or discernment.

Nor bigots who but one way see, through blinkers of authority. M. Green.

3. pl.

A kind of goggles, used to protect the eyes form glare, etc.

© Webster 1913.