Definition of dichotomous key
: a key for the identification of organisms based on a series of choices between alternative characters
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“Dichotomous key.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dichotomous%20key. Accessed 20 May. 2022.
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Time Traveler for dichotomous key
The first known use of dichotomous key was circa 1889
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