Webster's Revised Unabridged Dictionary -- Volume AB

Ac`u·punc"ture (?), v. t. To treat with acupuncture.

A·cus"tum·aunce (?), n. See Accustomance. [Obs.]

A·cut"an`gu·lar (?), a. Acute-angled.

A·cute" (?), a. [L. acutus, p. p. of acuere to sharpen, fr. a root ak to be sharp. Cf. Ague, Cute, Edge.]

1. Sharp at the end; ending in a sharp point; pointed; -- opposed to blunt or obtuse; as, an acute angle; an acute leaf.

2. Having nice discernment; perceiving or using minute distinctions; penetrating; clever; shrewd; -- opposed to dull or stupid; as, an acute observer; acute remarks, or reasoning.

3. Having nice or quick sensibility; susceptible to slight impressions; acting keenly on the senses; sharp; keen; intense; as, a man of acute eyesight, hearing, or feeling; acute pain or pleasure.

4. High, or shrill, in respect to some other sound; -- opposed to grave or low; as, an acute tone or accent.

5. (Med.) Attended with symptoms of some degree of severity, and coming speedily to a crisis; -- opposed to chronic; as, an acute disease.

-- Acute angle (Geom.), an angle less than a right angle.

Syn. -- Subtile; ingenious; sharp; keen; penetrating; sagacious; sharp-witted; shrewd; discerning; discriminating. See Subtile.

A·cute", v. t. To give an acute sound to; as, he acutes his rising inflection too much. [R.] Walker.

A·cute"-an`gled (-ă"g'ld), a. Having acute angles; as, an acute-angled triangle, a triangle with every one of its angles less than a right angle.

A·cute"ly, adv. In an acute manner; sharply; keenly; with nice discrimination.