| water purslane | <botany> See Purslane. Source: Websters Dictionary (01 Mar 1998) |
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| water qualm | <medicine> See Water brash, under Brash. Source: Websters Dictionary (01 Mar 1998) |
| water rabbit | <zoology> See Water hare. Source: Websters Dictionary (01 Mar 1998) |
| water radish | <botany> A coarse yellow-flowered plant (Nasturtium amphibium) related to the water cress and to the horse-radish. Source: Websters Dictionary (01 Mar 1998) |
| 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) |
| 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 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) |