Definitions

from The Century Dictionary.

  • noun A petrified spiral seed-vessel of plants of the genus Chara, found in fresh-water deposits, and formerly supposed to be a shell.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Paleon.) The petrified fruit of the Chara hispida, a species of stonewort. See stonewort.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun paleontology The petrified fruit of Chara hispida, a species of stonewort.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

Ancient Greek circle, ring + fruit.

Examples

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