[1] Despite that, the meaning of the term "phosphoryl" varies, depending on the branch of scientific discipline.
In biology, biochemistry and biomedicine branches, the term "phosphoryl" refers to groups consisting of phosphorus atom attached to three oxygen atoms, with the simplified chemical formula −PO3 (there are several groups called "phosphoryl" in those branches, with the chemical formulas −P(=O)(−O−)2, −P(=O)(−O−)(−OH), −P(=O)(−OH)2, −P(=O)(−O−)−O−, −P(=O)(−OH)−O− and −P(=O)(−O−)2).
[4] The term "phosphoryl" in the mentioned branches is usually used in the description of catalytic mechanisms in living organisms.
Examples of molecules containing those groups in biology, biochemistry and biomedicine are adenosine monophosphate (AMP), adenosine diphosphate (ADP), adenosine triphosphate (ATP), phosphocreatine (PCr) and DNA.
Contrary to biology, biochemistry and biomedicine branches, in organic and inorganic chemistry branches, and in the branch of chemical nomenclature (see IUPAC), the correct name for the −P(=O)(−O−)2 group is not "phosphoryl", but phosphonato, and the correct name for the −P(=O)(−OH)2 group is phosphono, and the term phosphoryl correctly refers to the trivalent >P(=O)− group.