Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

optically active

adjective

Definition of optically active

  1. :  capable of rotating the plane of vibration of polarized light to the right or left —used of compounds, molecules, or atoms



1875

First Known Use of optically active

1875


Medical Dictionary

optically active

adjective

Medical Definition of optically active

  1. :  capable of rotating the plane of vibration of polarized light to the right or left :  either dextrorotatory or levorotatory—used of compounds, molecules, or atoms




Learn More about optically active

  1. Medical Dictionary: Definition of "optically active"


Seen and Heard

What made you want to look up optically active? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

February 8, 2016

to clear from accusation or blame

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

spindrift duvet pince-nez kittly-benders
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ