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Definition of Ulmin
1. n. A brown amorphous substance found in decaying vegetation. Cf. Humin.
Definition of Ulmin
1. Noun. (organic compound) A brown amorphous substance found in decaying vegetation. ¹
¹ Source: wiktionary.com
Definition of Ulmin
1. a gum from trees [n -S]
Medical Definition of Ulmin
1.