change of form or structure; conversion from one form to another. In oncology, the change that a normal cell undergoes as it becomes malignant. bacterial transformation the exchange of genetic material between strains of bacteria by the transfer of a fragment of naked DNA from a donor cell to a recipient cell, followed by recombination in the recipient chromosome.
1. Synonym(s): metamorphosis
1. Synonym(s): metamorphosis 2. A change of one tissue into another, as cartilage into bone.
1. Synonym(s): metamorphosis 2. A change of one tissue into another, as cartilage into bone. 3. In metals, a change in phase and physical properties in the solid state caused by heat treatment.