What context can I use each word in?
Learn when and how to use these words with these examples!
foci
Example
The foci of the parabola are equidistant from the directrix. [foci: plural noun]
Example
The foci of the research study were the effects of social media on mental health. [foci: plural noun]
nucleus
Example
The nucleus of the atom is positively charged. [nucleus: noun]
Example
The nucleus of the cell controls all its functions. [nucleus: noun]
Good things to know
Which word is more common?
Nucleus is more commonly used than foci in everyday language, especially in scientific contexts. Nucleus is a versatile word that can be used in various fields, while foci is more specialized and less common.
What’s the difference in the tone of formality between foci and nucleus?
Both foci and nucleus are formal words that are typically used in academic or scientific contexts. However, nucleus is more versatile and can be used in both formal and informal contexts, while foci is less common and more specialized.
