noughth

nought +‎ -th

• (General American) IPA^(key): /nɔtθ/
• (cot–caught merger, Canada) IPA^(key): /nɑtθ/
• (Received Pronunciation) IPA^(key): /nɒtθ/
• Rhymes: -ɔːtθ, -ɒtθ

noughth (not comparable)

1. (rare) Before the first; zeroth.
   • 1860, The Atlantic Monthly, volume 5, page 130:

     By that, the value of the successive places, counting from right to left, being equal to the successive powers of the base, beginning with the noughth power, each figure in the combination is multiplied in value by the power of the base proper to its place, and the value of the whole is equal to the sum of those products.

• noughth week