A mathematical symbol (ℵ₀) representing the smallest infinite number, used to count how many whole numbers or points on a line exist.
From Hebrew 'alef' (the first letter, representing 'one') combined with 'zero' from Arabic 'ṣifr' (empty). First introduced by mathematician Georg Cantor in the late 1800s to describe infinite quantities.
Alef zero blew mathematicians' minds because it proved infinity comes in different sizes—some infinities are actually bigger than others! This simple symbol revolutionized how we understand numbers and space itself.
Complete word intelligence in one call. Free tier — 50 lookups/day.