| water rail | <zoology> Any one of numerous species of rails of the genus Rallus, as the common European species (Rallus aquaticus). Source: Websters Dictionary (01 Mar 1998) |
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| water rat | 1. <zoology> The water vole. See Vole. The muskrat. The beaver rat. See Beaver. 2. A thief on the water; a pirate. Source: Websters Dictionary (01 Mar 1998) |
| water rattler | <zoology> The diamond rattlesnake (Crotalus adamanteus); so called from its preference for damp places near water. Source: Websters Dictionary (01 Mar 1998) |
| water rocket | 1. <botany> A cruciferous plant (Nasturtium sylvestre) with small yellow flowers. 2. A kind of firework to be discharged in the water. Source: Websters Dictionary (01 Mar 1998) |
| water sapphire | <chemical> A deep blue variety of iolite, sometimes used as a gem. Synonym: saphir d'eau. Origin: Equiv. To F. Saphir d'eau. Source: Websters Dictionary (01 Mar 1998) |
| water scorpion | <zoology> See Nepa. Source: Websters Dictionary (01 Mar 1998) |
| water shield | <botany> An aquatic American plant (Brasenia peltata) having floating oval leaves, and the covered with a clear jelly. Source: Websters Dictionary (01 Mar 1998) |
| water shrew | <zoology> Any one of several species of shrews having fringed feet and capable of swimming actively. The two common European species (Crossopus fodiens, and C. Ciliatus) are the best known. The most common American water shrew, or marsh shrew (Neosorex palustris), is rarely seen, owing to its nocturnal habits. Source: Websters Dictionary (01 Mar 1998) |
| water snail | 1. <zoology> Any aquatic pulmonate gastropod belonging to Planorbis, Limnaea, and allied genera; a pond snail. 2. <mechanics> The Archimedean screw. Source: Websters Dictionary (01 Mar 1998) |
| water snake | <zoology> A common North American colubrine snake (Tropidonotus sipedon) which lives chiefly in the water. Any species of snakes of the family Homalopsidae, all of which are aquatic in their habits. Source: Websters Dictionary (01 Mar 1998) |
| water soldier | <botany> An aquatic European plant (Stratiotes aloides) with bayonet-shaped leaves. Source: Websters Dictionary (01 Mar 1998) |
| water-soluble chlorophyll derivatives | The copper complex of sodium and/or potassium salts of saponified chlorophyll, used topically for deodorization of chronic lesions and to promote wound repair. (05 Mar 2000) |
| water sore | Cutaneous larva migrans caused by larvae of hookworms. Synonym: ancylostoma dermatitis, ancylostomiasis cutis, coolie itch, dew itch, ground itch, swamp itch, swimmer's itch, toe itch, water itch, water sore. (05 Mar 2000) |
| water souchy | A dish consisting of small fish stewed and served in a little water. Alternative forms: water souchet] See Zoutch. Source: Websters Dictionary (01 Mar 1998) |
| water sparrow | <zoology> The reed warbler. The reed bunting. Source: Websters Dictionary (01 Mar 1998) |