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fox snake a harmless rat snake, having a yellowish color with dark patches on the back.
fox squirrel any of several large tree squirrels, varying in color, that are found in the eastern part of the United States.
foxtail the tail of a fox. [2 definitions]
fox terrier one of two breeds of English terriers with long lean heads, formerly trained to drive foxes from their holes.
fox trot a ballroom dance in four-four time, consisting of a variety of short and long steps. [2 definitions]
fox-trot to dance a fox trot.
foxy of or like a fox, as in cunning. [3 definitions]
foyer a lobby, esp. of a theater or hotel; anteroom. [2 definitions]
FPO abbreviation of "fleet post office."
fps abbreviation of "foot-pound-second," or "foot-pound-seconds," of, designating, or pertaining to the system of measurement in which the foot, pound, and second are the basic units of length, mass, and time.
Fr symbol of the chemical element francium.
Fr. abbreviation of "Frater" (Latin); brother (used in a proper name, esp. in connection with a religious fraternal order).
Fra a title for an Italian monk or friar in the Roman Catholic Church; brother.
fracas a noisy disturbance or quarrel.
fracking the injection into an oil or natural gas well of large amounts of pressurized water containing sand and chemicals, which fractures the surrounding rock, creating fissures through which oil or gas flows into the well, thus increasing its output; hydraulic fracturing.
fractal in mathematics and physics, a very irregular line or surface that is formed of an endless number of irregular sections, so that its dimensions or other physical properties are always only approximations based on the system of measuring that is used.
fraction a number expressed as one number or algebraic quantity divided by another. [4 definitions]
fractional pertaining to or consisting of a fraction. [2 definitions]
fractional currency coins or paper money with a value less than the standard monetary unit, such as a U.S. dime or quarter.
fractionate to separate into ingredients, component parts, or the like, as by a chemical separation.
fractious inclined to be irritable and quarrelsome; cranky. [2 definitions]