half-century

noun3

1. •
   A period of fifty years, half of a century.
2. •
   A score of 50 runs by a single batsman in one innings

   • He brought up his half-century with a powerful drive past offspinner Dan Cullen, whose seven overs cost 0-52. — 2009
3. •
   A score of 50 points in a single game.

   • Selby's charge continued with a half-century in the 30th frame and a fluked red set him on the way to winning the 31st frame. — 2023