su·​per·​phos·​phate | \ˌsü-pər-ˈfäs-ˌfāt \

Definition of superphosphate 

1 : an acid phosphate

2 : a soluble mixture of phosphates used as fertilizer and made from insoluble mineral phosphates by treatment with sulfuric acid

Examples of superphosphate in a Sentence

Recent Examples on the Web

Use superphosphate if squirrels have a tendency to dig in your beds. Kathy Huber, Houston Chronicle, "Don't murder the crape myrtles when pruning," 2 Feb. 2018 Mix a little bone meal or superphosphate in the soil around each tuber. Kathy Huber, Houston Chronicle, "Don't murder the crape myrtles when pruning," 2 Feb. 2018

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

First Known Use of superphosphate

1798, in the meaning defined at sense 1

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The first known use of superphosphate was in 1798

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