• WordNet 3.6
    • adj humic of or relating to or derived from humus "humic acid"
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Webster's Revised Unabridged Dictionary
    • a Humic (Chem) Pertaining to, or derived from, vegetable mold; as, humic acid. See Humin.
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Century Dictionary and Cyclopedia
    • humic Pertaining to or derived from mold (humus).
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Chambers's Twentieth Century Dictionary
    • adj Humic hū′mik denoting an acid formed by the action of alkalies on humus or mould.
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Webster's Revised Unabridged Dictionary
L. humus, the earth, ground: cf. F. humique,


In literature:

The insoluble woody fibre of the straw is decomposed and converted into humic and ulmic acids.
"Talks on Manures" by Joseph Harris
The residues, which are insoluble in water, but redissolve in ammonia, have the properties of humic acids.
"Researches on Cellulose" by C. F. Cross
This solvent separates the humic and ulmic acids from the undecomposed vegetable fibers.
"Peat and its Uses as Fertilizer and Fuel" by Samuel William Johnson
In such soils humic acids are present and the requisite alkalinity is thus awanting.
"Manures and the principles of manuring" by Charles Morton Aikman
Are humus and humic acid of great practical importance?
"The Elements of Agriculture" by George E. Waring

In science:

Calcite speleothems frequently display luminescence that is produced by calcium salts of humic and fulvic acids derived from soils above the cave (SHOPOV, 1989a, 1989b; WHITE & BRENNAN, 1989).
Luminescence of Speleothems in Italian Gypsum Caves: Preliminary Report
Luminescence organics in speleothems can be divided in four types: 1) Calcium salts of fulvic acids; 2) Calcium salts of humic acids; 3) Calcium salts of huminomelanic acids; 4) Organic esters.
Luminescence of Speleothems in Italian Gypsum Caves: Preliminary Report