- a colonial hydroid of the genus Obelia, common in temperate seas and appearing as a delicate, mosslike growth on rocks, pilings, etc.
Origin of obelia
1865–70; < New Latin < Greek obelías a loaf toasted on a spit, equivalent to obel(ós) a spit (see obelisk) + -ias noun suffix
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for obelia
Scientists have happily given these most euphonious names—Campanularia, Obelia, and Plumularia.The Log of the Sun
Two of the commonest British hydroids belong to this family, Obelia and Clytia.