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Uncommonfoci
The correct spelling is foci.
How to pronounce foci
noun
IPA: /ˈfəʊ.kaɪ/
Say it like: Fos-i
The correct spelling is foci. A point at which reflected or refracted rays of light converge. For example: "The heat of sunlight at the focus of a magnifying glass can easily set dry leaves on fire."
Usage Examples
“The heat of sunlight at the focus of a magnifying glass can easily set dry leaves on fire.”
“Unfortunately, the license plate is out of focus in this image.”
“During this scene, the boy’s face shifts subtly from soft focus into sharp focus.”
Definition
noun
- 1.A point at which reflected or refracted rays of light converge.
- 2.A point of a conic at which rays reflected from a curve or surface converge.
- 3.The fact of the convergence of light on the photographic medium.
- 4.The quality of the convergence of light on the photographic medium.
- 5.Concentration of attention.
Similar words
Words related in meaning — check their spelling too.