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noun, plural lu·ci·dae [loo-si-dee] /ˈlu sɪˌdi/. Astronomy.
  1. the brightest star in a constellation.
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Origin of lucida

1720–30; < New Latin, special use of Latin lūcida (stella) bright (star), feminine of lūcidus lucid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for lucida

Historical Examples

  • The lucida, or chief star, in the ancient constellation Pegasus.

    The Sailor's Word-Book

    William Henry Smyth

  • One of the ancient northern constellations, of which the lucida is Markab.

    The Sailor's Word-Book

    William Henry Smyth

  • Mistress Lucida, you did once love me; if you do still, no more words, but give me your hand.

  • The stars γ and β are pointer stars to a fifth-magnitude star the lucida of the asterism Lacerta, the lizard about 15° from β.

    A Field Book of the Stars

    William Tyler Olcott

  • His "glittering shafts" are of course the sunbeams, the "lucida tela diei" of Lucretius.