1) Distinguished 1) Specialised 2) Specialized 
The similarity between a normal cell and the cancer cell, defines what degree of change has occurred. Cancer cells that are well differentiated are close to the original cell and are usually less aggressive. Poorly differentiated cells have changed more and are more aggressive. ... (09 Oct 1997) ... 
Cells with identical, or nearly identical genotype which have become distinct through developmental changes, e.g. muscle cells and liver cells have differentiated from common precursor cells but are phenotypically distinct.
Type: Term Pronunciation: dif′ĕr-en′shē-ā-tĕd Definitions: 1. Having a different character or function from the surrounding structures or from the original type; said of tissues, cells, or portions of the cytoplasm.
A type of cell, which specializes in one specific task or has one specific purpose.
[adj] - (biology) exhibiting biological specialization 2. [adj] - made different (especially in the course of development) or shown to be different
adjective made different (especially in the course of development) or shown to be different; `the differentiated markings of butterflies`; `the regionally differentiated results`