The decade from 1800 to 1809. / The century from 1800 to 1899.

The decade from 1850 to 1859.

(historical) A military conflict that lasted from 1812 to 1815, fought between the United States of America and the United Kingdom, its North American colonies, and its North American Indian allies.

Abbreviation of eighteenth.

plural of 18650

18650 (electrochemical battery of a secondary storage cell)

An aerial maneuver in which the performer spins through five full revolutions.

(Australia) The section of the Racial Discrimination Act that makes it an offence to "offend, insult, humiliate or intimidate" a person of a certain race, colour or national or ethnic origin.

plural of 18mo

(cellular automata) A one-dimensional binary cellular automaton rule, notable for solving the majority problem as well as for its ability to simultaneously describe several, seemingly quite different, particle systems.