ultrarare

adjective ul·tra·rare \ ˌəl-trə-ˈrer \
variants: or ultra-rare

Definition of ultrarare

: extremely rare or uncommon
  • ultra-rare diseases
  • an ultrarare baseball card
  • reunited the band for an ultrarare appearance
  • The ultrarare Highland Scotch has been called the "crowning glory" in the … collection and comes in a hand-blown bottle, individually numbered in wax.
  • —Mia Stainsby

First Known Use of ultrarare

1822

in the meaning defined above

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