| freshwater marsh | <ecology> Wetland dominated by herbaceous plants under the influence of fresh water. (09 Oct 1997) |
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| marsh | <ecology> A tract of wet land principally inhabitated by partially-submerged herbaceous vegetation. (05 Jan 1998) |
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| marsh fever | See malaria. (12 Dec 1998) |
| marsh gas | <chemistry> A light, colourless, gaseous, inflammable hydrocarbon, CH4; marsh gas. See Marsh gas, under Gas. <chemistry> Methane series, a series of saturated hydrocarbons, of which methane is the first member and type, and (because of their general chemical inertness and indifference) called also the paraffin (little affinity) series. The lightest members are gases, as methane, ethane; intermediate members are liquids, as hexane, heptane, etc. (found in benzine, kerosene, etc); while the highest members are white, waxy, or fatty solids, as paraffin proper. Source: Websters Dictionary (01 Mar 1998) |
| marsh marigold | <botany> A perennial plant of the genus Caltha (C. Palustris), growing in wet places and bearing bright yellow flowers. In the United States it is used as a pot herb under the name of cowslip. See Cowslip. Source: Websters Dictionary (01 Mar 1998) |
| salt marsh | A community of organisms dominated by plants that are tolerant of wet, saline soils, generally found in low-lying coastal habitats which are periodically wet and unusually saline to hypersaline. The term salt marsh summarizes the saline conditions of the habitat as well as the emergent vegetation which dominates it. Plants which grow in salt marshes are thus tolerant of two conditions: saline and wet. (09 Oct 1997) |
| salt water marsh | Wetland dominated by herbaceous plants under the influence of saline waters. May be coastal (tidal) or perched. (09 Oct 1997) |