- plural of focus.
foci
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The fasting mice had better blood values, less fatty liver and liver inflammation and above all: they developed less liver cancer and had fewer cancer foci in the liver.
From Science Daily ● May 7, 2024
The center must be the midpoint of the line segment joining the foci.
From Textbooks ● Dec. 21, 2021
Identify the center, vertices, co-vertices, and foci of the ellipse.
From Textbooks ● Sep. 23, 2020
The sun is one of the foci of the elliptical orbit.
From Textbooks ● May 6, 2020
Ellipses have two centers, or foci; the more elongated the ellipse, the farther apart these foci are.
From "Zero: The Biography of a Dangerous Idea" by Charles Seife
