the world > plants > particular plants > plants and herbs > a grass or grasses > reedy or aquatic grasses > [noun] > sea grasses (2)
One of various plants and seaweeds growing in the sea: (a) a pondweed, Ruppia maritima; (b) the eel-grass or grass-wrack, Zostera marina; also, the…
(a) a grass or (?) sedge with pendent spicules; (b) Ruppia maritima, an aquatic herb of which the seed-vessels are borne on clusters of…