red seaweed

noun

1. any marine red alga, especially one of the genus Polysiphonia, having a reddish, much branched thallus.

red seaweed

noun

1. See red algae
   another term for red algae

Word History and Origins

Origin of red seaweed¹

First recorded in 1750–60

Example Sentences

Feed additives like Mootral’s products or red seaweed could immediately reduce cattle’s methane emissions, as could incorporating more fats and proteins into their diets.

From MIT Technology Review

Love deep as the sea as a rose must wither,As the rose-red seaweed that mocks the rose.

From Project Gutenberg

The next thing that Laughing Sapphire found was a glowing piece of red seaweed.

From Project Gutenberg

"See the pretty red seaweed on the rocks, mamma," cried a little boy, pointing to the low ledge on the bank of the east channel.

From Project Gutenberg

These were all entangled in a mass of red seaweed, interlaced with stalks of the Macrocystis.

From Project Gutenberg