Defn: A great blackish seaweed of the Southern Ocean, having a hollow and expanding stem and a pinnate frond, sometimes twenty feet long.
2. (Zoöl.)
Defn: Any large marine univalve shell of the genus Triton. See
Triton.
SEA TURN
Sea" turn`.
Defn: A breeze, gale, or mist from the sea. Ham. Nav. Encyc.
SEA TURTLE Sea" tur"tle. (Zoöl.) (a) Any one of several very large species of chelonians having the feet converted into paddles, as the green turtle, hawkbill, loggerhead, and leatherback. They inhabit all warm seas. (b) The sea pigeon, or guillemot.
SEA UNICORN
Sea" u"ni*corn. (Zoöl.)
Defn: The narwhal.
SEA URCHIN
Sea" ur"chin. (Zoöl.)
Defn: Any one of numerous species of echinoderms of the order
Echinoidea.