Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Any of various colonial marine hydroids of the genus Obelia, having various specialized feeding and reproductive polyps and growing in a branchlike form. Colonies of obelia are found as a delicate furlike growth on the wooden piles of piers and wharves.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any of various colonial marine hydroids of the genus Obelia.

from The Century Dictionary and Cyclopedia

  • n. A genus of campanularian polyps, distinguished from Campanularia by the flat discoidal medusæ with many marginal tentacles and eight interradial vesicles.

Etymologies

New Latin Obelia, genus name, probably from Greek obeliās, a loaf baked on a spit, from obelos, a spit.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek  (obelia, "a round cake"). (Wiktionary)

Examples

  • Obelia Medusa: Second Generation - The second generation of the obelia life cycle begins when the medusae are released by the gonozooids and become free swimming forms.

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  • Obelia Hydroid: First Generation - The first obelia generation, illustrated in the photomicrograph in this section, lives in hydroid colonies, consisting of polyps.

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