geosmin

noun

geo·smin jē-ˈō-smən How to pronounce geosmin (audio)

ˈjē-ō-

plural geosmins

: a volatile, organic compound C₁₂H₂₂O that is formed especially by soil-dwelling bacteria (such as streptomyces) and aquatic cyanobacteria and that may contribute to the earthy, pleasant odor of petrichor or impart a disagreeable, musty taste and odor to drinking water and certain fish

In the test kitchen, we too have noticed a mysterious muddy flavor in some catfish and tilapia. … When the fish swim in the geosmin-rich water, they consume the compound as they ingest the algae.

Cook's Illustrated

Geosmin can be detected by a human nose at miniscule concentrations, as low as just a few parts per trillion, [Kelley Dearing] Smith said.

James Bruggers

Note: Geosmin is a tertiary alcohol having a hydroxyl group (-OH) attached to a carbon atom that has three other carbon atoms attached to it.

Word History

Etymology

Greek gē-, geō-, combining form of gê "earth" + osmḗ "odor" + -in entry 1 — more at geo-, anosmia

Note: Term introduced by the American biochemist Nancy N. Gerber (1929-85) and the French-born American biologist Hubert A. Lechevalier (1926-2015) in "Geosmin, an Earthy-Smelling Substance Isolated from Actinomycetes," Applied Microbiology, vol. 13, no. 6 (November, 1965), pp. 935-38.

First Known Use

1965, in the meaning defined above

单词	geosmin
释义	geosmin noun geo·smin jē-ˈō-smən ˈjē-ō- plural geosmins : a volatile, organic compound C₁₂H₂₂O that is formed especially by soil-dwelling bacteria (such as streptomyces) and aquatic cyanobacteria and that may contribute to the earthy, pleasant odor of petrichor or impart a disagreeable, musty taste and odor to drinking water and certain fish In the test kitchen, we too have noticed a mysterious muddy flavor in some catfish and tilapia. … When the fish swim in the geosmin-rich water, they consume the compound as they ingest the algae. Cook's Illustrated Geosmin can be detected by a human nose at miniscule concentrations, as low as just a few parts per trillion, [Kelley Dearing] Smith said. James Bruggers Note: Geosmin is a tertiary alcohol having a hydroxyl group (-OH) attached to a carbon atom that has three other carbon atoms attached to it. Word History Etymology Greek gē-, geō-, combining form of gê "earth" + osmḗ "odor" + -in entry 1 — more at geo-, anosmia Note: Term introduced by the American biochemist Nancy N. Gerber (1929-85) and the French-born American biologist Hubert A. Lechevalier (1926-2015) in "Geosmin, an Earthy-Smelling Substance Isolated from Actinomycetes," Applied Microbiology, vol. 13, no. 6 (November, 1965), pp. 935-38. First Known Use 1965, in the meaning defined above
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