A type of skateboard which simulates the movement of a snowboard when used on a downhill coarse, allowing snowboarding techniques, which has an addition of two centerline casters that extend below the traditional skateboard wheels and bogies.
The distance between a water level and the top of something that contains or restrains it (such as a dam).
The distance between the top of sea ice and the water level.
The vertical distance between the waterline and the uppermost watertight deck of a vessel.
A pin inserted through holes at the end of an axle or shaft, so as to secure a wheel or shaft-mounted device.
A central cohesive source of stability and security; a person or thing that is critical to a system or organisation.
To adopt as, or serve as, a central cohesive source of stability and security.