differentiation

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differentiation (dif-er-en-shi-ay-shŏn) n.
1. (in embryology) the process in embryonic development during which unspecialized cells or tissues become specialized for particular functions.

2. (in oncology) the degree of similarity of tumour cells to the structure of the organ from which the tumour arose. Tumours are classified as well, moderately, or poorly differentiated. See also grade.

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