PERIHELION
\pˌɛɹɪhˈɛli͡ən], \pˌɛɹɪhˈɛliən], \p_ˌɛ_ɹ_ɪ_h_ˈɛ_l_iə_n]\
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periapsis in solar orbit; the point in the orbit of a planet or comet where it is nearest to the sun
By Princeton University
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periapsis in solar orbit; the point in the orbit of a planet or comet where it is nearest to the sun
By DataStellar Co., Ltd
By William Dodge Lewis, Edgar Arthur Singer
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.-.