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noun, Astronomy.
a large-scale solar event involving an ejection of hot plasma that may accelerate charged particles and travel as far as the earth’s orbit, preceded by a shock front that may create a magnetic storm on earth.
Abbreviation: CME.
a cloud of particles ejected from the sun’s surface during a solar flare
coronal mass ejection
(kôr’ə-nəl, kŏr’-, kə-rō’nəl)
A massive, bubble-shaped burst of plasma expanding outward from the Sun’s corona, in which large amounts of superheated particles are emitted at nearly the speed of light. The emissions can cause disturbances in the solar wind that disrupt satellites and create powerful magnetic storms on Earth. They were first observed in the early 1970s, when photographs taken from satellites revealed coronal activity that could not be seen in images taken from Earth.


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  • Coronal plane

    coronal plane n. A vertical plane at right angles to a sagittal plane, dividing the body into anterior and posterior portions. Also called frontal plane.

  • Coronal-suture

    noun, Anatomy. 1. a seam extending across the skull where the frontal bone and the parietal bones meet. noun 1. the serrated line across the skull between the frontal bone and the parietal bones coronal suture n. The suture extending across the skull between the two parietal bones and the frontal bone.

  • Corona-radiata

    [kuh-roh-nuh rey-dee-ey-tuh] /kəˈroʊ nə ˌreɪ diˈeɪ tə/ noun, plural coronae radiatae [kuh-roh-nee rey-dee-ey-tee] /kəˈroʊ ni ˌreɪ diˈeɪ ti/ (Show IPA). Anatomy. 1. the layer of follicle cells surrounding an ovum and remaining attached to it following ovulation.

  • Coronarism

    coronarism cor·o·na·rism (kôr’ə-nə-rĭz’əm) n.

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