(geometry) An acute triangle.

(medicine) Synonym of acute necrotizing ulcerative gingivitis

(medicine) Synonym of acute necrotizing ulcerative gingivitis

A rare diacritical mark (˝) made up of two acute accents on the same letter, usually a vowel.

plural of double acute accent

a type of leukemia that affects the lymphocytes

plural of acute-angled triangle

(phonology and typography, obsolete, rare) A dipping tone, or the diacritic that denotes it, similar in form to the breve (˘) and the háček (ˇ).

(botany) A disease of unknown cause that affects oaks in the United Kingdom.

altitude sickness