PCR /pi si ɑɹ/verb 1adjective 1noun 6forms 3 verb1 •To perform a polymerase chain reaction. adjective1 •Initialism of post-consumer recycled. noun6 •Initialism of polymerase chain reaction. •Initialism of protein/creatinine ratio. •Initialism of principal component regression. •Initialism of pitch control rod. •Initialism of primary control rod. •Initialism of power control rod. formsPCRed · PCRing · PCRs