What does "bladderwrack" mean?

Fucus vesiculosus, a seaweed in which iodine was first discovered.

Bladderwrack

Common synonyms include: bladder fucus, ascophyllum nodosum, black rockweed, black tang, black tang, black tany.

noun

noun ·Rare ·Advanced level

Noun

1
Fucus vesiculosus, a seaweed in which iodine was first discovered. uncountable, usually
"Someone stood on a string of bladderwrack and made it pop, and some distance away the tide was turning."
2
a common rockweed used in preparing kelp and as manure wordnet
3
similar to and found with black rockweed wordnet

"Someone stood on a string of bladderwrack and made it pop, and some distance away the tide was turning."

From bladder + wrack.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.