Scal·lop n.  [Written also scollop.]
 1. Zool. Any one of numerous species of marine bivalve mollusks of the genus Pecten and allied genera of the family Pectinidae. The shell is usually radially ribbed, and the edge is therefore often undulated in a characteristic manner. The large adductor muscle of some the species is much used as food. One species (Vola Jacobaeus) occurs on the coast of Palestine, and its shell was formerly worn by pilgrims as a mark that they had been to the Holy Land. Called also fan shell. See Pecten, 2.
 Note: ☞ The common edible scallop of the Eastern United States is Pecten irradians; the large sea scallop, also used as food, is Pecten Clintonius syn. Pecten tenuicostatus.
 2. One of series of segments of circles joined at their extremities, forming a border like the edge or surface of a scallop shell.
 3. One of the shells of a scallop; also, a dish resembling a scallop shell.


 Fan n.
 1. An instrument used for producing artificial currents of air, by the wafting or revolving motion of a broad surface; as: (a) An instrument for cooling the person, made of feathers, paper, silk, etc., and often mounted on sticks all turning about the same pivot, so as when opened to radiate from the center and assume the figure of a section of a circle. (b) Mach. Any revolving vane or vanes used for producing currents of air, in winnowing grain, blowing a fire, ventilation, etc., or for checking rapid motion by the resistance of the air; a fan blower; a fan wheel. (c) An instrument for winnowing grain, by moving which the grain is tossed and agitated, and the chaff is separated and blown away. (d) Something in the form of a fan when spread, as a peacock's tail, a window, etc. (e) A small vane or sail, used to keep the large sails of a smock windmill always in the direction of the wind.
    Clean provender, which hath been winnowed with the shovel and with the fan.   --Is. xxx. 24.
 2. That which produces effects analogous to those of a fan, as in exciting a flame, etc.; that which inflames, heightens, or strengthens; as, it served as a fan to the flame of his passion.
 3. A quintain; -- from its form. [Obs.]
 Fan blower, a wheel with vanes fixed on a rotating shaft inclosed in a case or chamber, to create a blast of air (fan blast) for forge purposes, or a current for draft and ventilation; a fanner.
 Fan cricket Zool., a mole cricket.
 Fan light Arch., a window over a door; -- so called from the semicircular form and radiating sash bars of those windows which are set in the circular heads of arched doorways.
 Fan shell Zool., any shell of the family Pectinidæ. See Scallop, n., 1.
 Fan tracery Arch., the decorative tracery on the surface of fan vaulting.
 Fan vaulting Arch., an elaborate system of vaulting, in which the ribs diverge somewhat like the rays of a fan, as in Henry VII.'s chapel in Westminster Abbey. It is peculiar to English Gothic.
 Fan wheel, the wheel of a fan blower.
 Fan window. Same as Fan light (above).
 electric fan. a fan having revolving blades for propelling air, powered by an electric motor.