When you overhear only a small bit of information, this is an example of a snippet of information.
Origin of snippetdiminutive of snip
- A bit, scrap, or morsel: “sparkling black bass &ellipsis; strewn with snippets of coriander and basil” (Gael Greene).
- Informal A small or mischievous person.
snippet - Computer Definition
A small amount of something. In the computer field, it often refers to a small piece of program code.