transfer rna: RNA molecules present in the cell (in at least 20 varieties, each variety capable of combining with a specific amino acid) that attach the correct amino acid to the protein chain that is being synthesized at the ribosome of the cell (according to directions coded in the mRNA)
material: the tangible substance that goes into the makeup of a physical object
white ash: spreading American ash with leaves pale green or silvery beneath and having hard brownish wood