dichotomous key

noun

Definition of dichotomous key

: a key for the identification of organisms based on a series of choices between alternative characters

First Known Use of dichotomous key

circa 1889

in the meaning defined above

See Words from the same year
NEW! Time Traveler

Medical Dictionary

dichotomous key

noun

medical Definition of dichotomous key

: a key for the identification of organisms based on a series of choices between alternative characters

Seen and Heard

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

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to pay off by making regular payments

Get Word of the Day daily email!

Test Your Vocabulary

Words for Summer: A Quiz

  • a-closeup-of-a-sunflower
  • Which of the following words means “of or relating to summer”?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Add Diction

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

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!