Mouth of a trumpet or bell.
A character, or group of characters, in the genetic code carried by the living cell, which directs the formation of a particular amino-acid.
In genetics, a triplet of bases (see base pair) in a molecule of DNA or RNA that directs the placement of a particular amino acid during the process of protein (polypeptide) synthesis. There are 64 codons in the genetic code.
A specific sequence of three adjacent bases on a strand of DNA or RNA that provides genetic code information for a particular amino acid.