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