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There are 2 eighteen-letter words containing FIRSTO

first␣order␣of␣the␣dayfirst-order␣spectrum

3 definitions found

  • first␣order␣of␣the␣day — n. (Politics) An item of business that will be discussed before… — n. A goal or task that is of primary importance and will or should…
  • first-order␣spectrum — n. (Physics) A spectrum produced by a diffraction grating whose…
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