coronal system
(ECHINODERMATA: Echinoidea)
In sea urchins, plates forming the wall of the test.

Online Dictionary of Invertebrate Zoology. . 2005.

Look at other dictionaries:

  • Coronal suture — Side view of the skull. ( Coronal suture visible near top.) …   Wikipedia

  • Coronal mass ejection — A coronal mass ejection in time lapse imagery obtained with the LASCO instrument. The Sun (center) is obscured by the coronagraph s mask. (September 30 – October 1, 2001) A coronal mass ejection (CME) is a massive burst of solar wind, other light …   Wikipedia

  • Coronal loop — Typical coronal loops observed by TRACE Coronal loops form the basic structure of the lower corona and transition region of the Sun. These highly structured and elegant loops are a direct consequence of the twisted solar magnetic flux within the… …   Wikipedia

  • Coronal radiative losses — In astronomy and in astrophysics, for radiative losses of the solar corona, it is meant the energy flux irradiated from the external atmosphere of the Sun (traditionally divided into chromosphere, transition region and corona), and, in particular …   Wikipedia

  • Coronal hole — Coronal holes are areas where the Sun s corona is darker, colder, and has lower density plasma than average. These were found when X ray telescopes in the Skylab mission were flown above the Earth s atmosphere to reveal the structure of the… …   Wikipedia

  • coronal commissure — the branch of the head canal sensory system extending across the top of the head between the eyes joining the two supraorbital canals …   Dictionary of ichthyology

  • coronal pore — the dorsal median pore of the cephalic lateral line system (q.v.) at the point of juncture of the branches from each supraorbital canal. Abbreviated COR …   Dictionary of ichthyology

  • apical system — (ECHINODERMATA: Echinoidea) Plates surrounding the body organs of sea urchins, found at the dorsal or aboral pole of the test; see coronal system …   Dictionary of invertebrate zoology

  • Solar System — This article is about the Sun and its planetary system. For other systems, see planetary system and star system. For a list of physical and orbital statistics for the Solar System s largest bodies, see List of gravitationally rounded objects of… …   Wikipedia

  • List of Solar System probes — For a list of active probes only, see List of active Solar System probes. For a list of landers only, see Landings on other planets. This is a list of all space probes that have left Earth orbit (or were launched with that intention but failed),… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”