undifferentiated \undif`feren"tia`ted\, a.
   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.
   1913 webster
see also:
differentiation 

undifferentiated
     adj : not differentiated syn: uniform ant: differentiated
see also:
uniform differentiated 

143 moby thesaurus words for "undifferentiated":
   abstract, accordant, agnate, akin, alike, analogous, articulated,
   austere, automatic, balanced, bare, basic, bland, broad, catenated,
   ceaseless, chaste, collective, comparable, concatenated, connected,
   consistent, consonant, constant, continual, continued, continuing,
   continuous, correspondent, corresponding, cyclical, direct,
   elementary, endless, equable, equal, essential, even, featureless,
   flat, fundamental, gapless, general, generalized, generic, homely,
   homespun, homogeneous, immediate, immutable, incessant, indefinite,
   indeterminate, indiscernible, indistinct, indistinctive,
   indistinguishable, indivisible, interchangeable, interminable,
   invariable, irreducible, joined, jointless, level, linked,
   measured, mechanical, mere, methodic, monolithic, monotonous,
   nebulous, neutral, never-ending, nonspecific, nonstop, of a piece,
   ordered, orderly, parallel, perennial, periodic, persistent, plain,
   primal, primary, pure, pure and simple, recurrent, regular,
   repetitive, robotlike, round-the-clock, running, seamless, serried,
   severe, similar, simon-pure, simple, single, smooth, spare, stable,
   standard, stark, steadfast, steady, stereotyped, straight,
   systematic, twenty-four-hour, unadorned, unbroken, unceasing,
   unchangeable, unchanged, unchanging, uncharacterized, uncluttered,
   undeviating, undifferenced, undiscriminated, undistinguishable,
   undistinguished, undiversified, unending, uniform, unintermitted,
   unintermittent, unintermitting, uninterrupted, unrelieved,
   unremitting, unruffled, unspecified, unstopped, unvaried,
   unvarying, vague, wide, without distinction