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cirrus definition

cir·rus (sir′əs)

noun

  1. pl. cirri cir′ri′ (-ī′)Biol.
    1. a plant tendril
    2. a flexible, threadlike tentacle or appendage, as the feelers of certain organisms
    3. a cone-shaped cluster of fused cilia, occurring in many species of infusorians
  2. pl. cirrus cir′·rusMeteorol. the type of white cloud that resembles a wispy filament, found at high altitudes and consisting of ice crystals

Etymology: L, a lock, curl, tendril

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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