undifferentiated

adjective

un·​dif·​fer·​en·​ti·​at·​ed ˌən-ˌdi-fə-ˈren(t)-shē-ˌā-təd How to pronounce undifferentiated (audio)
: not divided or able to be divided into different elements, types, etc. : not differentiated
undifferentiated cells
an undifferentiated mass

Examples of undifferentiated in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The other, the endosperm, is an undifferentiated mass of cells whose fate is to feed its sibling and die in the process. — Literary Hub, 25 Mar. 2026 This floods the market with a black box of undifferentiated output. — Anshul Gupta, Forbes.com, 18 June 2026 The palettes are often chalky and austere—bleached grays, oxidized browns—and the subject matter can blur into undifferentiated bulk. — Eren Orbey, New Yorker, 23 June 2026 By contrast, a simpler, undifferentiated asteroid would have produced a rounder basin. — Stefanie Waldek, Space.com, 7 May 2026 See All Example Sentences for undifferentiated

Word History

First Known Use

1862, in the meaning defined above

Time Traveler
The first known use of undifferentiated was in 1862

Rhymes for undifferentiated

See All Rhymes for undifferentiated

Browse Nearby Words

undifferenced
undifferentiated
undigested
See all Nearby Words

Cite this Entry

“Undifferentiated.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undifferentiated. Accessed 7 Jul. 2026.

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Medical Definition

undifferentiated

adjective
un·​dif·​fer·​en·​ti·​at·​ed -ˌdif-ə-ˈren-chē-ˌāt-əd How to pronounce undifferentiated (audio)
: not differentiated
an undifferentiated sarcoma
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