apex
noun
- vertex which is in some sense the highest of the figure to which it belongs
- Latin diacritic similar to an acute accent
- curved diacritic used in the early Vietnamese alphabet to represent syllable-final nasalization
- leaf part
Wiktionary
name
- Acronym of Association of Professional, Executive, Clerical and Computer Staff.
noun
- Acronym of advance purchase excursion (an air fare).
- Acronym of accelerated peritoneal equilibration examination.
- Acronym of acetone peroxide.