| sea turtle | <zoology> 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. The sea pigeon, or guillemot. Source: Websters Dictionary (01 Mar 1998) |
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| sea unicorn | <zoology> The narwhal. Source: Websters Dictionary (01 Mar 1998) |
| sea urchin | <zoology> Any one of numerous species of echinoderms of the order Echinoidea. When living they are covered with movable spines which are often long and sharp. Source: Websters Dictionary (01 Mar 1998) |
| sea urchin granuloma | Granulomatous nodules, either foreign-body type or composed of epitheliod cells, from the retention of the spine of the sea urchin, occurring several months after the wounding of the skin. (05 Mar 2000) |
| sea urchins | Somewhat flattened, globular echinoderms of the class echinoidea, having thin, brittle shells of calcareous plates. (12 Dec 1998) |
| sea whip | <zoology> A gorgonian having a simple stem. Source: Websters Dictionary (01 Mar 1998) |
| sea widgeon | <zoology> The scaup duck. The pintail duck. Source: Websters Dictionary (01 Mar 1998) |
| sea willow | <zoology> A gorgonian coral with long flexible branches. Source: Websters Dictionary (01 Mar 1998) |
| sea wing | <zoology> A wing shell (Avicula). Source: Websters Dictionary (01 Mar 1998) |
| sea wolf | <zoology> The wolf fish. The European sea perch. The sea elephant. A sea lion. Source: Websters Dictionary (01 Mar 1998) |
| sea woodcock | <zoology> The bar-tailed godwit. Source: Websters Dictionary (01 Mar 1998) |
| sea wood louse | <zoology> A sea slater. Source: Websters Dictionary (01 Mar 1998) |
| sea wormwood | <botany> A European species of wormwood (Artemisia maritima) growing by the sea. Source: Websters Dictionary (01 Mar 1998) |
| sea wrack | <botany> See Wrack. Source: Websters Dictionary (01 Mar 1998) |