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 framework used to protect workmen in making an adit under ground, and capable of being pushed along as excavation progresses.
A large expanse of exposed stable Precambrian rock.
A wide and relatively low-profiled volcano, usually composed entirely of lava flows.
Parts at the front and back of a vehicle which are meant to absorb the impact of a collision
A broad piece of defensive armor, held in hand, formerly in general use in war, for the protection of the body.
One who protects or defends.
A spot resembling, or having the form of a shield.
A sign or symbol, usually containing numbers and sometimes letters, identifying a highway route.
The escutcheon or field on which are placed the bearings in coats of arms.
A field of energy that protects or defends.
In lichens, a hardened cup or disk surrounded by a rim and containing the fructification, or asci.
A police badge.
To protect, to defend.
to protect from the influence of
To shelter; to protect oneself.