Not differentiated; specifically (Biol.), homogenous, or nearly so; -- said especially of young or embryonic tissues which have not yet undergone differentiation (see Differentiation, 3), that is, which show no visible separation into their different structural parts.

of a cell, not changed in any way from its original form.

having no limited or specialized function or structure, as in stem cells

Very immature cells that are not specialised are called undifferentiated. If a cancer cell is completely undifferentiated, it may not be possible to tell what type of cell it originally was, and so what type of cancer it is from.

In a meristematic state or resembling a meristem; lacking the specialized or differential gene expression characteristic of specialized cells.

Undifferentiated cells are those which have not been committed to become part of a specialized tissue.

cells that lack a specialized structure and function. ein: a blood vessel that carries blood to the heart.

Not having changed to become a specialized cell type.

An immature, embryonic, or primitive cell. It has a nonspecific appearance with multiple nonspecific activities and functions poorly. See differentiate, dedifferentiate.

The state wherein the cell in culture lacks the specialized structure and/or function of the cell type in vivo.

A tumor that appears "wild" under the microscope, not resembling the tissue of origin. These tumors tend to grow and spread faster than well-differentiated tumors, which do resemble the normal tissue they come from.

Very immature cells that do not have a specialised role, for example stem cells. If a cancer cell is undifferentiated, it may not be possible to tell what type of cell it was originally, and so what type of cancer it came from.

When a stem cell hasn’t grown into a specialized cell like a heart or bone cell. When stem cells are undifferentiated they still have the ability to grow into a specialized cell.

A term used to describe cells or tissues that do not have specialized ("mature") structures or functions. Undifferentiated cancer cells often grow and spread quickly.

Not having developed into a specialized cell or tissue type.