A gramophone record played at 33⅓ revolutions per minute.

plural of 33

(physics) A minor stable isotope of sulfur, ³³₁₆S, having sixteen protons and seventeen neutrons; it amounts to less than 1% of the element in nature

plural of 33

Initialism of Advanced Technology Attachment, 33 Mb/s transfer rate.

Abbreviation of thirty-third.