(economics) Any medium of exchange, printed or digital, that represents something of value, but has little or no intrinsic value of its own.

Occurring after a period of retirement.

A sacred writing or holy book. / (by extension) An authoritative statement.

(biochemistry) Any of a group of membrane-bound enzymes that cleave extracellular portions of transmembrane proteins, releasing the soluble ectodomains from the cell surface.