phosphoribosylpyrophosphate
noun
phos·pho·ri·bo·syl·py·ro·phos·phate
| \ ˌfäs-phō-ˌrī-bə-ˌsil-ˌpī-rō-ˈfäs-ˌfāt
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Medical Definition of phosphoribosylpyrophosphate
: a substance that is formed enzymatically from ATP and the phosphate of ribose and that plays a fundamental role in nucleotide synthesis