either of two grasslike marine aquatic plants (flowering underwater) occurring in shallow coastal waters of the Caribbean and south-eastern United…

the red alga Laurencia pinnatifida, a seaweed with a pungent smell and a peppery taste that was formerly eaten in parts of Scotland.

Originally: a sessile marine invertebrate (not identified; probably a soft coral or a sponge). In later use also: a seaweed, esp. the green alga Enter…

a marine plant, Cladophora (Conferva) rupestris.

an edible seaweed, Saccharina (formerly Ulva) latissima (family Laminariaceae); also called sea lettuce.

A cosmopolitan genus of seaweeds (marine red algae, division Rhodophyta, class Bangiophyceae, order Bangiales), with simple foliose thalli varying…

Any of a group of chiefly tropical calcareous red algae (coralline rhodophytes) of the genus Lithothamnion and related genera (order Corallinales)…

(see quots.).

a red alga, Polysiphonia harveyi.

a brown seaweed, Chorda filum (family Chordaceae), having long ropelike fronds.

= laver, n.1 2.

A dark-coloured seaweed, Sargassum (or Hizikia) fusiforme, that is cultivated as a foodstuff in South-East Asia and typically dried and rehydrated…