subitize

Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • verb To judge (the number of objects in a group) rapidly, accurately and confidently without counting them.
  • verb To have the ability of judging the number of objects in a group in this way

Examples

  • Specifically, people and animals subitize, or perceive and estimate the number of objects by glance.

    FOXNews.com

Note

The word 'subitize' comes from a Latin word meaning 'sudden'.