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apse; falling back; tending to return to a former worse state. Relapsing fever (Med.), an acute, epidemic, contagious fever, which prevails also endemically in Ireland, Russia, and some other regions. It is marked by one or two remissions of the fever, by articular and muscular pains, and by the presence, during the pa…

o extending sometimes to the deeper organs, as the heart. Inflammatory rheumatism (Med.), acute rheumatism attended with fever, and attacking usually the larger joints, which become swollen, hot, and very painful. -- Rheumatism root. (Bot.) See Twinleaf.

qual and the opposite sides parallel. The angles may be unequal, two being obtuse and two acute, as in the cut, or the angles may be equal, in which case it is usually called a square.

bed patches of little or no elevation and often alternately fading and reviving; also, an acute specific disease which is characterized by an eruption of this character; -- called also rose rash. -- Ro*se"o*lous, a.

An acute specific disease with a dusky red cutaneous eruption resembling that of measles, but unattended by catarrhal symptoms; -- called also German measles.

The quality of being sagacious; quickness or acuteness of sense perceptions; keenness of discernment or penetration with soundness of judgment; shrewdness. Some [brutes] show that nice sagacity of smell. Cowper. Natural sagacity improved by generous education. V. Knox.

To utter a harsh, shrill cry; to make a sharp outcry, as in terror or acute pain; to scream; to shriek. "The screech owl, screeching loud." Shak.

phasized: "Native practical intelligence, natural prudence, mother wit, tact in behavior, acuteness in the observation of character, in contrast to habits of acquired learning or of speculation." -- Moral sense. See under Moral, (a). -- The inner, or internal, sense, capacity of the mind to be aware of its own states;…

Hence: Liable to impression from without; easily affected; having nice perception or acute feeling; sensitive; also, readily moved or affected by natural agents; delicate; as, a sensible thermometer. "With affection wondrous sensible." Shak.

Having quick and acute sensibility, either to the action of external objects, or to impressions upon the mind and feelings; highly susceptible; easily and acutely affected. She was too sensitive to abuse and calumny. Macaulay.

Affecting the sense as if pointed or cutting, keen, penetrating, acute: to the taste or smell, pungent, acid, sour, as ammonia has a sharp taste and odor; to the hearing, piercing, shrill, as a sharp sound or voice; to the eye, instantaneously brilliant, dazzling, as a sharp flash.

Having quick or acute sight; -- used literally and figuratively. -- Sharp`-sight`ed*ness, n.

Having an acute or nicely discerning mind.

To render more quick or acute in perception; to make more ready or ingenious. The air . . . sharpened his visual ray To objects distant far. Milton. He that wrestles with us strengthens our nerves and sharpens our skill. Burke.

In a sharp manner,; keenly; acutely. They are more sharply to be chastised and reformed than the rude Irish. Spenser. The soldiers were sharply assailed with wants. Hayward. You contract your eye when you would see sharply. Bacon.

The quality or condition of being sharp; keenness; acuteness.

Acute; sharp; piercing; having or emitting a sharp, piercing tone or sound; -- said a sound, or of that which produces a sound. Hear the shrill whistle which doth order give To sounds confused. Shak. Let winds be shrill, let waves roll high. Byron.

In a shrill manner; acutely; with a sharp sound or voice.

Artlessness of mind; freedom from cunning or duplicity; lack of acuteness and sagacity. Marquis Dorset, a man, for his harmless simplicity neither misliked nor much regarded. Hayward. In wit a man; simplicity a child. Pope.

of the voluntary and rational soul; that state of the animal in which there is a lessened acuteness of sensory perception, a confusion of ideas, and a loss of mental control, followed by a more or less unconscious state. "A man that waketh of his sleep." Chaucer. O sleep, thou ape of death. Shak.