undifferentiated

From un- +‎ differentiated.

undifferentiated (comparative more undifferentiated, superlative most undifferentiated)

1. Not differentiated, not different, alike.
   • 2023 November 9, Christopher Ingram, ““Weathergami” charts paint new portrait of Minnesota climate”, in Minnesota Reformer‎^[1]:

     If we just plopped down a dot for every observation we’d end up with an undifferentiated black blob, so the weathergami technique visualizes frequency of temperature pairs: we divide the chart area into a fine hexagonal grid, and then color each hexagon according to how many daily observations fall within it.

2. (biology) Describing tissues where the individual cells have not yet developed mature or distinguishing features, or describes embryonic organisms where the organs cannot be identified.
   • 2022 May 7, Liang En WeeEdwin Philip ConceicaoJean Xiang-Ying SimMay Kyawt AungAung Myat Ooet al., “Dengue and COVID-19: Managing Undifferentiated Febrile Illness during a ‘Twindemic’”, in Tropical medicine and infectious disease, →DOI:

     This further exacerbated the diagnostic challenge posed by undifferentiated febrile illness during a “twindemic” of both COVID-19 and dengue, as both illnesses could potentially present with febrile syndromes.

3. (botany) Describing a plant body where the vascular tissue has not developed, as in the thallophytes.

• differentiated