(physics) A rare stable isotope of oxygen, ¹⁷₈O, having eight protons and nine neutrons; it amounts to 0.037% of the element in nature

(of a movie) Only suitable for adults.

Alternative form of sweet seventeen

plural of sweet 17

The decade from 1750 to 1759.

The decade from 1740 to 1749.

The decade from 1770 to 1779.

The decade from 1790 to 1799.

The decade from 1730 to 1739.

The decade from 1760 to 1769.