rarity

 
Pronunciation: /ˈrɛːrɪti/

noun (plural rarities)

[mass noun]
  • the state or quality of being rare: the rarity of the condition
  • [count noun] a rare thing, especially one having particular value: to take the morning off was a rarity

Origin:

late Middle English: from Latin raritas, from rarus 'far apart, infrequently found' (see rare1)

Spelling help

Remember that, although it is related to rare, rarity is spelled with an i in the middle.