COMMUTATOR
\kˈɒmjuːtˌe͡ɪtə], \kˈɒmjuːtˌeɪtə], \k_ˈɒ_m_j_uː_t_ˌeɪ_t_ə]\
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A device for changing alternating electrical current to direct current, or direct current to alternating current; generally used on a generator or motor.
By William Dodge Lewis, Edgar Arthur Singer
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Elec. A device to change the direction or vary the strength of an electric current in a dynamo, motor, etc.
By James Champlin Fernald
By Willam Alexander Newman Dorland
Word of the day
Proto Oncogene Proteins c erbB 2
- cell surface protein-tyrosine kinase that is found to be overexpressed in significant number adenocarcinomas. It has extensive homology can heterodimerize EGF EPIDERMAL GROWTH FACTOR), 3 receptor (RECEPTOR, 3) and the 4 receptor. Activation of erbB-2 receptor occurs during heterodimer formation with a ligand-bound erbB family members. EC 2.7.11.-.