humic acid


: any of various organic acids obtained from humus

Examples of humic acid in a Sentence

Recent Examples on the Web Covington Liquid Aerator’s formula consists of over 100 billion live microbes per gallon in addition to minerals, essential nutrients, humic acid and seaweed extract which all work to loosen and break up soil and increase the uptake of nutrients. Jack Byram, Better Homes & Gardens, 9 Jan. 2024 This product combines peat mud, salicylic acid, and naturally derived ingredients like fulvic and humic acids. Lindsay Modglin, Health, 1 June 2023 Made of organic plant root fungi, bacteria, and humic acid, the mix supports healthy plant growth by boosting root development, stem strength, and even the vibrancy of leaves . Gabriela Izquierdo, Better Homes & Gardens, 31 Jan. 2023 Consumers have the option of dozens of products — in drops, tablets, powders and pastes — that claim to provide the healing power of fulvic and humic acid. NBC News, 2 Dec. 2021 As humic acid is made more bio-available, weed seeds are much less likely to germinate. Howard Garrett, Dallas News, 28 Dec. 2020 All of it has darkened somewhat because of the development of humic acids. Rodrigo Pérez Ortega, Science | AAAS, 18 Feb. 2020

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'humic acid.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1843, in the meaning defined above

Time Traveler
The first known use of humic acid was in 1843

Dictionary Entries Near humic acid

Cite this Entry

“Humic acid.” Dictionary, Merriam-Webster, Accessed 23 Jun. 2024.

Medical Definition

humic acid

hu·​mic acid ˈhyü-mik- How to pronounce humic acid (audio) ˈyü- How to pronounce humic acid (audio)
: any of various organic acids obtained from humus

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