phosphate rock

noun

Definition of phosphate rock 

: a rock that consists largely of calcium phosphate usually together with other minerals (such as calcium carbonate), is used in making fertilizers, and is a source of phosphorus compounds

Examples of phosphate rock in a Sentence

Recent Examples on the Web

On average across Europe today, fertilizer contains about 32 milligrams of cadmium per kilogram (mg Cd/kg) of phosphorus, but the level can be as high as 200 mg Cd/kg, depending on where the phosphate rock is mined. Natasha Gilbert, Science | AAAS, "European Union debates controversial plans to limit cadmium in fertilizer," 10 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'phosphate rock.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of phosphate rock

1869, in the meaning defined above

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The first known use of phosphate rock was in 1869

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