A hydrometeor consisting of a visible aggregate of minute water droplets suspended in the atmosphere near the earth's surface. Fog differs from cloud only in that the base of fog is at the earth's surface while clouds are above the surface.
A faintly-colored circular arc similar to a rainbow but formed on fog layers containing drops whose diameters are 100 microns or less. Also called mistbow, white rainbow.
A metal whose luster has been reduced because of a surface film, usually a corrosion product layer.
A crane with a boom consisted of several sections, being capable of moving the weight positions though folding the boom.
A sea with waves approaching from the stern of the boat; a sea in which the waves are moving in the same direction as the vessel
A unit of illuminance or illumination equal to one lumen per foot'. This is the illuminance provided by a light source of one candle at a distance of one foot.