from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A plural of focus.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Plural form of focus.

from The Century Dictionary and Cyclopedia

  • n. Plural of focus.


Sorry, no etymologies found.


  • Remaining weak point: the curses are the main thing that seems different about the Oracle and her foci from a normal cleric and her domains; a focus feels just kinda like a “double strength domain.”

    Paizo APG Playtest Continues « Geek Related

  • Domain foci, domain generalisability, also continues to push on something else I am not sure we’re always ready to accept, which is the increased diversity of knowledge in the discipline of Computer Science.

    Low Morale in CS? « Beki's Blog (there's an original name)

  • The infection of the cells incited them to grow uncontrollably, forcing them to form tiny distorted heaps containing hundreds of cells that Temin called foci the plural of focus.

    The Emperor of All Maladies

  • Some epilepsy is triggered by the activity of a small identifiable area, known as the foci, and spreads to the rest of the brain with catastrophic effect.

    Mind Hacks: NewSci on music, depression and brain-cooling chips

  • In an ellipse there are two points situated upon the line representing the major axis, and which are termed the foci when both are spoken of, and a focus when one only is referred to, foci simply being the plural of focus.

    Mechanical Drawing Self-Taught

  • In addition, bright granular or punctuate structures termed foci were also noted in the perinuclear region around the Golgi apparatus (stained with anti-GM130 in red).

    PLoS ONE Alerts: New Articles

  • These structures were very similar to those termed foci found previously in RPE cells

    PLoS ONE Alerts: New Articles

  • The two "centres" are called foci (which is the plural of focus - one focus, two foci).

    Irregular Webcomic!

  • In this study, the researchers demonstrated that Vpr forms mobile structures called foci on the DNA of host cells.

    RedOrbit News - Technology

  • (i-LIPS) In geometry, a curve traced out by a point that is required to move so that the sum of its distances from two fixed points (called foci) remains constant.



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  • "foci" in Hungarian is the diminutive / popular form of saying "soccer".

    August 11, 2012

  • Plural of focus.

    November 24, 2007