at bat

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A player's official turn at bat, counted in figuring batting average and other statistics, usually with walks, sacrifice hits, and instances of being hit by a pitch or being interfered with by the catcher discounted.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• phrase baseball In the batter's box.
• noun baseball A final resolution to a batter's turn at the plate which does not result in a walk, a hit by pitch, a sacrifice hit or sacrifice fly, or catcher interference