polycytidylic acid

noun

poly·​cyt·​i·​dyl·​ic acid ˌpäl-i-ˌsit-ə-ˈdil-ik- 

: RNA or a segment of RNA that is composed of a polynucleotide chain consisting entirely of cytosine-containing nucleotides and that codes for a polypeptide chain consisting of proline residues when functioning as messenger RNA in protein synthesis

called also poly(C)

see poly i entry c