ETYM Old Eng. wrak wreck. Related to Wreck.
1. Dried seaweed esp. that cast ashore.
2. The destruction or collapse of something; SYN. rack.
Seaweed or wreckage cast up on shore.
Sea-weed cast up on shore; wreckage; vestige.
Any of the large brown seaweeds characteristic of rocky shores. The bladder wrack Fucus vesiculosus has narrow, branched fronds up to 1 m/3.3 ft long, with oval air bladders, usually in pairs on either side of the midrib or central vein.