polyuridylic acid

noun

poly·​uri·​dyl·​ic acid ˌpäl-ē-ˌyu̇r-ə-ˌdil-ik- 

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

called also poly(U)