# foci

Pronunciation: say "FOH-sy" US /ˈfoʊ.kaɪ/, UK /ˈfəʊ.kaɪ/

## Noun

1. Plural of focus. — plural of focus
   - Simple: Plural of focus. Use this form when talking about more than one focus.
   - _An ellipse is defined by two foci and the sum of distances to them._
   - _Researchers identified several foci of infection within the affected tissue._

Source: DictionaryAI, https://dictionaryai.com/define/foci (written from Wiktionary data, CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0/).