dichotomous key

noun

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

Word History

First Known Use

circa 1889, in the meaning defined above

Time Traveler
The first known use of dichotomous key was circa 1889

Dictionary Entries Near dichotomous key

Cite this Entry

“Dichotomous key.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dichotomous%20key. Accessed 28 Mar. 2024.

Kids Definition

dichotomous key

noun
: a series of pairs of phrases or descriptions which are used to classify a group of living things by making choices between the sets of traits and characters described in each pair

Medical Definition

dichotomous key

noun
: a key for the identification of organisms based on a series of choices between alternative characters
Love words? Need even more definitions?

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