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eyepiece the lens or lenses in an optical instrument, such as a microscope or telescope, through which one views the object or image under scrutiny.
eye shadow colored or tinted makeup applied to the upper eyelids.
eyeshot the range of vision. (See earshot.)
eyesight the ability to see; vision. [2 definitions]
eyesore something that is unpleasant or offensive to look at, esp. something that mars an otherwise pleasing view.
eyespot a primitive visual organ that is sensitive to light, found in many invertebrates. [2 definitions]
eyestrain discomfort or fatigue in the eyes or head, caused by using the eyes improperly or excessively.
eyetooth a canine tooth in the upper jaw, located beneath the eye.
eyewash a liquid for bathing or administering medicine to the eye. [2 definitions]
eyewink the action of winking the eye.
eyewitness one who has witnessed an occurrence with his or her own eyes. [2 definitions]
eyrie variant of aerie.
eyrir the smaller monetary unit of Iceland. (Cf. krona.)
Ezekiel according to the Old Testament, a major Hebrew prophet of the sixth century B.C. [2 definitions]
F2 symbol of the chemical element fluorine.
F3 abbreviation of "female."
F1 abbreviation of "Fahrenheit," of, pertaining to, or designating a temperature scale on which thirty-two degrees is the freezing point and 212 degrees is the boiling point of water.
F4 abbreviation of "false," untrue or incorrect.
F5 abbreviation of "fermi," a unit of length equal to 10-15 meter.
F- in the U.S. military, a fighter plane, such as an F-16.
f the sixth letter of the English alphabet. [4 definitions]