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Definition of "ulmin" []

  • A brown amorphous substance found in decaying vegetation. (noun)

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Use "ulmin" in a sentence
  • "Mulder, it is composed of a number of organic bodies, and he has identified the following substances -- ulmin, humin, ulmic, humic, geic acids, &c."
  • "-- After extracting the peat with solution of carbonate of soda, it still contains ulmin or humin."
  • "They are formed when the alkalies or their carbonates act on ulmin and humin, or upon ulmates or humates of lime, iron, etc. Their dilute solutions are yellow, or brown."
Words like "ulmin"
ulmine