GNU Collaborative International Dictionary of English

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  1.       
    
    paraformaldehyde , n. [Pref. para- + formaldehyde.] (Chem.) A polymer of formaldehyde obtained as a white crystalline substance by concentration of a formaldehyde solution. Formula (CH20)n. It dissolves in hot water with the release of formaldehyde, and is used as a disinfectant.
    1913 Webster
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