From The Collaborative International Dictionary of English v.0.44 [gcide]:
3. (Biol.) The gradual formation or production of organs or parts by a process of evolution or development, as when the seed develops the root and the stem, the initial stem develops the leaf, branches, and flower buds; or in animal life, when the germ evolves the digestive and other organs and members, or when the animals as they advance in organization acquire special organs for specific purposes.
From WordNet (r) 2.0 [wn]:
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
135 Moby Thesaurus words for "differentiation": addition, alteration, analysis, anatomization, approximation, atomization, capriciousness, change, changeability, changeableness, characterization, choppiness, contradistinction, dappleness, definition, demarcation, denomination, denotation, description, designation, desynonymization, deviation, difference, differencing, differentness, disclosure, discrimination, disequalization, disjunction, disorder, distinction, distinctiveness, distinguishment, divarication, divergence, diversification, division, egohood, equation, evolution, expression, extrapolation, fingering, hairsplitting, hint, human factor, identification, identity, inconsistency, inconstancy, indication, indicativeness, individualism, individuality, individualization, individuation, inequality, instability, integration, integrity, interpolation, inversion, involution, irregularity, jerkiness, manifestation, meaning, mercuriality, microscopic distinction, modification, motleyness, multiplication, mutability, naming, nice distinction, nominalism, nonconformism, nonconformity, nonstandardization, nonuniformity, notation, nuance, oneness, particularism, particularity, particularization, personal equation, personal identity, personality, personalization, personship, picking out, pluralism, pointing, pointing out, pointing to, practice, proportion, raggedness, reduction, segregation, selection, self-identity, selfhood, selfness, separation, severalization, severance, shade of difference, show, showing, signification, singularity, soul, specialization, specification, subtle distinction, subtraction, suggestion, symptomaticness, transformation, trichoschistism, unconformism, unconformity, unevenness, uniqueness, unorthodoxy, unsteadiness, variability, variation, variegation, variety, variousness, versatility, wavering
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