VIADUCT
\vˈa͡ɪədˌʌkt], \vˈaɪədˌʌkt], \v_ˈaɪ_ə_d_ˌʌ_k_t]\
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A bridge for carrying a roadway over a valley or ravine, etc., built of masonry arches or of short steel spans mounted on high steel towers.
By William Dodge Lewis, Edgar Arthur Singer
By Daniel Lyons
By William Hand Browne, Samuel Stehman Haldeman
By James Champlin Fernald
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.-.