annulus

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They are composed of a strong outer covering called the annulus, and a soft jelly center called the nucleus.

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Definitions (30)

Toggle American Heritage definitions American Heritage Dictionary (4)

  1. noun A ringlike figure, part, structure, or marking, such as a growth ring on the scale of a fish.
  2. noun A ring or group of thick-walled cells around the sporangia of many ferns that functions in spore release.
  3. noun The ringlike remains of a broken partial veil, found around the stipes of certain mushrooms.

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This word has been looked up 44 times.

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Etymologies (2)

Toggle American Heritage etymologies American Heritage Dictionary (1)

  1. Latin ānulus, ring, diminutive of ānus.

Toggle Century etymologies Century Dictionary (1)

  1. Latin, properly ānulus, a ring, especially a finger-ring, a signet-ring, in form diminutive of the rare ānus, a ring, prob. orig. *acnus and identical with annus, a circuit, periodical return, a year: see annals.
 

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/ˈænjuləs/
by American Heritage

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