subitize

UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ˈsʌbɪˌtaɪz/US:USA pronunciation: respellingUSA pronunciation: respelling(so̅o̅′bi tīz′)


WordReference Random House Unabridged Dictionary of American English © 2026
su•bi•tize  (so̅o̅′bi tīz′),USA pronunciation v.i., -tized, -tiz•ing. [Psychol.]
  1. Psychologyto perceive at a glance the number of items presented, the limit for humans being about seven.
Also,[esp. Brit.,] su′bi•tise′. 
  • Latin subit(us) sudden or Late Latin subit(āre) to appear suddenly (see subito) + -ize
  • 1949

Collins Concise English Dictionary © HarperCollins Publishers::
subitize, subitise /ˈsʌbɪˌtaɪz/ vb
  1. to perceive the number of (a group of items) at a glance and without counting: the maximum number of items that can be subitized is about five
Etymology: 20th Century: from Latin subitus sudden + -ize

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