meaning of cf

[keannu]

I frequently see the sign "cf" in my grammar book, but I don't know what the initial means, is it related to reference?

2. collective noun
nouns that are treated both as singular and plural..
.........................................
cf)There are two families in this house.

[SoothingDave]

Yes.

Cf - Wikipedia, the free encyclopedia.

cf., an abbreviation for the Latin word confer (the imperative singular form of conferre), literally meaning "bring together", is used to refer to other material or ideas which may provide similar or different information or arguments. It is mainly used in scholarly contexts, such as in academic (mainly humanities, physics, chemistry, and biology) or legal texts. It is translated, and can be read aloud, as "compare".