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ge in the internal state of the body. Perception is only a special kind of knowledge, and sensation a special kind of feeling. . . . Knowledge and feeling, perception and sensation, though always coexistent, are always in the inverse ratio of each other. Sir W. Hamilton.

Of or pertaining to sensation; as, sensational nerves.

rine held by Condillac, and by some ascribed to Locke, that our ideas originate solely in sensation, and consist of sensations transformed; sensualism; -- opposed to intuitionalism, and rationalism.

An advocate of, or believer in, philosophical sensationalism.

A sensation or sense impression following the removal of a stimulus producing a primary sensation, and reproducing the primary sensation in positive, negative, or complementary form. The aftersensation may be continuous with the primary sensation or follow it after an interval.

Previous sensation, notion, or idea. [Obs.] Dr. H. More.

sensibility of the retina of the eye for complementary colors. They are purely subjective sensations of color which often result from the contemplation of actually colored bodies. -- Accidental point (Persp.), the point in which a right line, drawn from the eye, parallel to a given right line, cuts the perspective pla…

An instrument to measure the degree of sensation, by determining at how short a distance two impressions upon the skin can be distinguished, and thus to determine whether the condition of tactile sensibility is normal or altered.

The science of sensation in relation to nervous action. H. Spenser.

art or organ; -- opposed to efferent; as, afferent vessels; afferent nerves, which convey sensations from the external organs to the brain.

The impression of a vivid sensation retained by the retina of the eye after the cause has been removed; also extended to impressions left of tones, smells, etc.

ular state of the atmosphere, as respects heat, cold, moisture, etc., or as affecting the sensations; as, a smoky air, a damp air, the morning air, etc.

An instrument for measuring sensations of pain due to pressure. It has a piston rod with a blunted tip which is pressed against the skin. -- Al*gom"e*try (#), n. -- Al`go*met"ric (#), *met"ric*al (#), a. --Al`go*met"ric*al*ly, adv.

Entire or partial loss or absence of feeling or sensation; a state of general or local insensibility produced by disease or by the inhalation or application of an anæsthetic.

word; to analyze an action to ascertain its morality. No one, I presume, can analyze the sensations of pleasure or pain. Darwin.

An organized living being endowed with sensation and the power of voluntary motion, and also characterized by taking its food into an internal cavity or stomach for digestion; by giving carbonic acid to the air and taking oxygen in the process of respiration; and by increasing in motive power or active aggressive force…

A movable, articulated organ of sensation, attached to the heads of insects and Crustacea. There are two in the former, and usually four in the latter. They are used as organs of touch, and in some species of Crustacea the cavity of the ear is situated near the basal joint. In insects, they are popularly called horns,…

Sudden diminution or loss of consciousness, sensation, and voluntary motion, usually caused by pressure on the brain.

Hot or burning; causing a sensation of burning; fiery; as, ardent spirits, that is, distilled liquors; an ardent fever.

The condition of one who is stunned. Hence: Numbness; loss of sensation; stupor; loss of sense. [Obs.] A coldness and astonishment in his loins, as folk say. Holland.