polyribosylribitol phosphate

noun
poly·​ri·​bo·​syl·​ri·​bi·​tol phosphate | \ˌpäl-i-ˌrī-bə-sil-ˌrī-bə-ˌtȯl-, -ˌtōl- \

Medical Definition of polyribosylribitol phosphate 

: a polysaccharide of the capsule of the Hib bacterium that exhibits activity against phagocytes — see conjugate vaccine

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