What does "dedifferentiation" mean?

The loss or reversal of differentiation.

What is a synonym for "dedifferentiation"?

Common synonyms include: anaplasia.

Pronounced //diːˌdɪfəɹɛnʃɪˈeɪʃən//.

/diːˌdɪfəɹɛnʃɪˈeɪʃən/ noun

noun ·Rare ·Advanced level

Noun

1
The loss or reversal of differentiation.
2
the loss of specialization in form or function wordnet
3
The biological process whereby cells revert from a specialized function to a simpler or less specialized form.

From de- + differentiation.