undifferentiated

Not differentiated; without clear distinctive characters: often used by naturalists to note species or groups which do not show well-marked distinctive characters, or, according to the theory of evolution, are not yet completely separated from other species or groups.

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.

Not differentiated.

describes tissues where the individual cells have not yet developed mature or distinguishing features, or describes embryonic organisms where the organs cannot be identified.

describes a plant body where the vascular tissue has not developed, as in the thallophytes

not differentiated