confocal

C3O1N1F4O1C3A1L1
UK/kənˈfəʊkəl/US/kənˈfoʊkəl/

adjective

Having the same foci.

OriginEnglish focal ← Middle English con- ← Latin con- →
Less commonScrabble 15
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Meanings

adjectiveconfocal (not comparable)
  1. not comparableengineeringHaving the same foci.
nounconfocal (plural confocals)

plural confocals

  1. Any of a pair of confocal mirrors or lenses

Origin

  1. Old Frenchcon-
  2. Proto-Indo-European*ḱe?
  3. Proto-Indo-European*ḱóm
  4. Proto-Italic*kom
  5. Proto-Italic*kom-
  6. Latincon-
  7. Middle Englishcon-
  8. Englishcon-
  9. Englishfocal
  10. Englishconfocal

From con- + focal.

Full word history & related roots →

Translations

French confocal
  • confocalHaving the same foci
Italian confocale
  • confocaleHaving the same foci
Portuguese confocal
  • confocalHaving the same foci
Spanish confocal
  • confocalHaving the same foci
Cite this entry
APA

confocal. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/confocal

MLA

“confocal.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/confocal. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “confocal,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/confocal.

Source: confocal on Wiktionary, CC BY-SA 4.0.