M 



Macchia 



Vegetation consisting of dense evergreen brush (shrubs 

 and small trees) in the Mediterranean region, denser than 

 Garique (q. v.), similar to Chaparral (q. v.). Syn. Maquis. 



Macronutrient (Macrometabolic Element) 



An element or a compound required by organisms in 

 relatively large quantity, e.g., calcium by clams, phosphorus 

 salts by clovers, cf. Micronutrient. 



Macrophyll 



See Leaf-size class. 



Macrophytic 



Refers to large aquatic plants, e.g., kelps, water cress. 



Macropterous 



Refers to an animal with unusually large wings or fins, 

 cf. Micropterous. 



Mdcrospecies 



See Linneon. 



Maestro 



A northwesterly wind in the central Mediterranean 

 region. 



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