1833 in science
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The year 1833 in science and technology involved some significant events, listed below.

Biology

• Anselme Payen discovers diastase (the first enzyme to be discovered).
• Marshall Hall coins the term "reflex" for a muscular reaction.

Chemistry

• Thomas Graham proposes Graham's Law.

Physics

• Wilhelm Eduard Weber develops an electromagnetic telegraph.

Awards

• Copley Medal: Not awarded

Births

• March 25 - Fleeming Jenkin (d. 1885), engineer.
• May 5 - Ferdinand Paul Wilhelm Richthofen (d. 1905), geographer.
• June 29 - Peter Waage (d. 1900), chemist.
• October 9 - Eugene Langen (d. 1895), engineer
• October 17 - Paul Bert (d. 1886), physiologist.
• October 21 - Alfred Nobel (d. 1896), inventor.
• December 2 - Daniel von Recklinghausen (d. 1910), pathologist.

Deaths

• January 10 - Adrien-Marie Legendre (b. 1752), mathematician.
• February 6 - Pierre André Latreille (b. 1762),zoologist.
• February 14 - Gottlieb Kirchhoff (b. 1764), chemist.
• April 22 - Richard Trevithick (b. 1771), engineer and inventor.
• July 5 - Nicéphore Niépce (b. 1765), inventor.
• October 31 - Johann Friedrich Meckel (b. 1781), anatomist.