![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
Value of soil moisture, expressed as a percentage of the mass of dry soil, below which a plant living in the soil dies by wilting.
![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
An air operated device for hoisting or pulling. Similar to a slusher or tugger or An engine for handling drafts of cargo secured on deck and fitted with drums on a horizontal axle.
![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
Air in motion relative to the surface of the earth. Almost exclusively used to denote the horizontal component.
![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
The direction from which the wind is blowing, measured in points of the compass or in azimuth degrees.
![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
Energy available from the movement of the wind across a landscape caused by the heating of the atmosphere, earth, and oceans by the sun.
![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
An apparatus for converting the energy available in the wind to mechanical energy that can be used to power machinery (grain mills, water pumps) and to operate an electrical generator.
![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
The distance or length of flow of the air past a point during a given interval of time.
![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
A group of wind turbines interconnected to a common utility system through a system of transformers, distribution lines, and (usually) one substation. Operation, control, and maintenance functions are often centralized through a network of computerized mo ...
![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
The process of characterizing the wind resource, and its energy potential, for a specific site or geographical area.
![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
A diagram that indicates the average percentage of time that the wind blows from different directions, on a monthly or annual basis.
![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
A flower-like diagram indicating the relative frequencies of different wind directions for a given station and period of time.
![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
The distance or length of flow of the air past a point during a given interval of time.
![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
A local variation of the wind vector or any of its components in a given direction.
![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
A fabric cone attached to a metal ring and used to indicate wind direction. often at airfields.