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An image of external objects fixed on the retina by the photochemical action of light on the visual purple. See Optography.

the retina by the photochemical action of light on the visual purple; the fixation of an image in the eye. The object so photographed shows white on a purple or red background. See Visual purple, under Visual.

Giving an image in correct or normal proportions; giving a flat field of view; as, an orthoscopic eyepiece.

Hence: An expression of popular homage; the tribute of the multitude to a public favorite. To rain an April of ovation round Their statues. Tennyson.

surface, as upon canvas; to represent by means of colors or hues; to exhibit in a tinted image; to portray with paints; as, to paint a portrait or a landscape.

which sweeps over the pampas of South America and the adjacent seas, often doing great damage. Sir W. Parish.

paraboloidal surface which gives for parallel rays (as those from very distant objects) images free from aberration. It is used in reflecting telescopes. -- Parabolic spindle, the solid generated by revolving the portion of a parabola cut off by a line drawn at right angles to the axis of the curve, about that line a…

oöl.), a very beautiful bird of New Guinea, of the genus Astrapia, having dark velvety plumage with brilliant metallic tints. -- Paradise nut (Bot.), the sapucaia nut. See Sapucaia nut. [Local, U. S.] -- Paradise whidah bird. (Zoöl.) See Whidah.

A mock moon; an image of the moon which sometimes appears at the point of intersection of two lunar halos. Cf. Parhelion.

To allow (a thread, cord, etc.) to run off; to unwind. -- To pay one's duty, to render homage, as to a sovereign or other superior. -- To pay out (Naut.), to pass out; hence, to slacken; to allow to run out; as, to pay out more cable. See under Cable. -- To pay the piper, to bear the cost, expense, or trouble. [Coll…

Feathery covering; plumage. [Obs.] Holland.

o peregrinus), remarkable for its wide distribution over all the continents. The adult plumage is dark bluish ash on the back, nearly black on the head and cheeks, white beneath, barred with black below the throat. Called also peregrine hawk, duck hawk, game hawk, and great-footed hawk.

rsonal action (Law), a suit or action by which a man claims a debt or personal duty, or damages in lieu of it; or wherein he claims satisfaction in damages for an injury to his person or property, or the specific recovery of goods or chattels; -- opposed to real action. -- Personal equation. (Astron.) See under Equati…

An image formed by the mind, and supposed to be real or material; a shadowy or airy appearance; sometimes, an optical illusion; a phantom; a dream. They be but phantasms or apparitions. Sir W. Raleigh.

Fig.: A medley of figures; illusive images. "This mental phantasmagoria." Sir W. Scott.

rent existence; an apparition; a specter; a phantasm; a sprite; an airy spirit; an ideal image. Strange phantoms rising as the mists arise. Pope. She was a phantom of delight. Wordsworth. Phantom ship. See Flying Dutchman, under Flying. -- Phantom tumor (Med.), a swelling, especially of the abdomen, due to muscular sp…

t of rays of light, as by pressure upon the eyeball when the lids are closed. Cf. After- image.

A luminous image or appearance of a hallucinatory character.

The process of obtaining an etched or engraved plate from the photographic image, to be used in printing; also, a picture produced by such a process.

f three optical lanterns for projecting objects on a screen in the colors of nature. The images of three partial photographs taken through color screens (red, green, and blue, respectively) are superimposed. Each image is given its own primary color, and these colors blend and reproduce the colors of the object.…