annular eclipse

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A solar eclipse in which the moon covers all but a bright ring around the circumference of the sun.

Wiktionary

1. n. astronomy a solar eclipse in which the thin outer disk of the sun can be seen as a ring around the moon

GNU Webster's 1913

1. adj. (Astron.) an eclipse of the sun in which the moon at the middle of the eclipse conceals the central part of the sun's disk, leaving a complete ring of light around the border.
2. n. (Astron.) See under Annular.

WordNet 3.0

1. n. only a thin outer disk of the sun can be seen