1) Unipotential 
In mathematics, a unipotent element r of a ring R is one such that r − 1 is a nilpotent element, in other words such that some power (r − 1)n is zero. In particular a square matrix M is a unipotent matrix if and only if its characteristic polynomial P(t) is a power of t − 1. Equivalently, M is unipotent if all its eigenvalues are 1. The term...
powerful in one direction only
Referring to those cells that produce a single type of daughter cell; e.g., a unipotent stem cell. ... Compare: pluripotent cells. ... (05 Mar 2000) ... 
Type: Term Pronunciation: yū′ni-pō′tĕnt Definitions: 1. Referring to those cells that produce a single type of daughter cell; a unipotent stem cell.
unipotent, unipotence 1. A reference to cells that are capable of developing into only one type of cell or tissue. 2. Referring to those cells that produce a single type of daughter cell; e.g., a unipotent stem cell.
(of cells) capable of developing into only one type of cell or tissue.