Supergiant-star
noun
1.
Astronomy. an exceptionally luminous star whose diameter is more than 100 times that of the sun, as Betelgeuse or Antares.
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[soo-per-gley-shuh l] /ˌsu pərˈgleɪ ʃəl/ adjective 1. on the surface of a glacier. 2. believed to have been formerly on the surface of a glacier: superglacial debris. superglacial /ˌsuːpəˈɡleɪsɪəl/ adjective 1. on or originating from the surface of a glacier
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noun, U.S. Government. 1. a high-level rank, Grade 16, 17, or 18, in the federal civil service. 2. a government employee having such a rank. adjective 3. of, relating to, or characteristic of such a rank or employee.
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[soo-per-gran-yuh-ley-shuh n] /ˌsu pərˌgræn yəˈleɪ ʃən/ noun, Astronomy. 1. one of a number of large convection cells in the photosphere and chromosphere of the sun, each having a diameter of 10,000–20,000 miles (16,000–32,000 km) and lasting longer than a day.