Meanings
nounulmin (countable and uncountable, plural ulmins)
plural ulmins · alternative ulmine
- countableuncountablechemistryA brown amorphous substance found in decaying vegetation.
The biological features of perennial grasses involve the decomposition of their residues during the period of domination of anaerobic processes, capable of producing active humus (ulminic acid and ulmin).
1966, NASA Technical Translation, page 10
Origin
- Latinulmus“elm”
- Englishulmin
Latin ulmus (“elm”), + -in: compare French ulmine.
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Cite this entry
APA
ulmin. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/ulmin
MLA
“ulmin.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/ulmin. Accessed November 2, 2026.
Chicago
WatkinsX Dictionary, s.v. “ulmin,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/ulmin.
Source: ulmin on Wiktionary, CC BY-SA 4.0.