(developmental biology) The ability of the cell to develop into any cell type.
For example, totipotency is exhibited by cells that can differentiate into any embryonic cell, as well as extraembryonic cells.
Word origin: toti- » from Latin tōtus, entire + -potence » from Latin potentia, power, capacity.
Related forms: totipotent (adjective)
Compare: unipotency, multipotency, pluripotency.
See also: potency.