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Optic   /ˈɑptɪk/   Listen
noun
Optic  n.  
1.
The organ of sight; an eye. "The difference is as great between The optics seeing, as the object seen."
2.
An eyeglass. (Obs.)


adjective
Optical, Optic  adj.  
1.
Of, pertaining to, or using vision or sight; as, optical illusions.
Synonyms: ocular, optic, visual. "The moon, whose orb Through optic glass the Tuscan artist views."
2.
Of or pertaining to the eye; ocular; as, the optic nerves (the first pair of cranial nerves) which are distributed to the retina; the optic (or optical) axis of the eye.
3.
Relating to the science of optics or to devices designed to assist vision; as, optical works; optical equipment.
Optic angle (Opt.), the angle included between the optic axes of the two eyes when directed to the same point; sometimes called binocular parallax.
Optic axis. (Opt.)
(a)
A line drawn through the center of the eye perpendicular to its anterior and posterior surfaces. In a normal eye it is in the direction of the optic axis that objects are most distinctly seen.
(b)
The line in a doubly refracting crystal, in the direction of which no double refraction occurs. A uniaxial crystal has one such line, a biaxial crystal has two.
Optical circle (Opt.), a graduated circle used for the measurement of angles in optical experiments.
Optical square, a surveyor's instrument with reflectors for laying off right angles.





Collaborative International Dictionary of English 0.48


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"Optic" Quotes from Famous Books



... twelve feet—with a high conical roof. The roof had an inner lining of wood, and through a hole in it—where a panel had been slid back—a large optic-glass, raised on a pivot-stand, thrust its nose out into the night. Close within the door stood an oaken press, and beside it, on a tripod, a brazier filled with charcoal and glowing. A truckle-bed, a chair, ...
— Corporal Sam and Other Stories • A. T. Quiller-Couch
... therefore, wakened on election morning with the damaged optic swollen shut and sadly discolored. Realizing that this unfortunate condition would not win votes, Mr. Hopkins remained at home all day and nagged his long-suffering spouse, whose ...
— Aunt Jane's Nieces at Work • Edith Van Dyne
... psychical, of the sense rather than of the intelligence. It commences at night: the incubator begins by seeing nocturnal visions, often of a photopsic* character, or hearing nocturnal sounds, neither of which have any material existence, being conveyed to his optic or auricular nerves not from without, but from within, by the agency of a disordered brain. These the reason, hitherto unimpaired, combats at first, especially when they are nocturnal only; but being reproduced, and becoming diurnal, the judgment succumbs under the ...
— Hard Cash • Charles Reade
... said!" cried the father heartily. "Well, you come of a military family, and I dare say I can get you a commission when the beard really does grow so that it can be seen without an optic glass." ...
— In Honour's Cause - A Tale of the Days of George the First • George Manville Fenn
... ever comes when I have to depend on the thing I won't get astray; for truth to tell it would be no fun to find oneself lost on these upper reaches of the great Saskatchewan. Sit right down here, and squint your optic over this set of hen-tracks, made by ...
— Canoe Mates in Canada - Three Boys Afloat on the Saskatchewan • St. George Rathborne


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