teichoic acid

noun
tei·cho·ic acid | \ tī-ˌkō-ik- \

Medical Definition of teichoic acid 

: any of a class of strongly acidic polymers found in the cell walls, capsules, and membranes of all gram-positive bacteria and containing residues of the phosphates of glycerol and adonitol

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occurring twice a year or every two years

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