Bullseye (target)

[2] In this sense, it was commonly used to describe the pontil mark on medieval crown-glass windows, where a blob (bullion, from the French boule) of molten glass was attached to a pole and spun rapidly to flatten it out into a large disk, from which windows were cut.

The center was much thicker, with a small divot where the pole was attached, and this was referred to as the bullseye.

Its use to describe the center of a target was first recorded in 1833, according to the Oxford English Dictionary, or possibly as early as 1813, according to other sources.

[7] In the World Grand Prix, which has a double start format, an inner bullseye can begin a leg.

In the dart golf game, the bullseye is part of a three-part tiebreaker that includes the treble twenty.