acute angle

We could not find the full phrase you were looking for.
The entry for 'acute' is displayed below.

Also see: angle

Concise Oxford English Dictionary © 2008 Oxford University Press:
acute/əˈkjuːt/

▶adjective

• 1 critical; serious: an acute housing shortage.

  ■ (of an illness) coming sharply to a crisis; severe.

  Often contrasted with chronic.

• 2 perceptive; shrewd.

  ■ (of a physical sense or faculty) highly developed.

• 3 (of an angle) less than 90°.

• 4 (of a sound) high; shrill.

▶noun short for acute accent.

– derivatives
acutance noun,
acutely adverb,
acuteness noun.

– origin ME: from L. acut-, acuere ‘sharpen’, from acus ‘needle’.