A more thorough explanation:

Definition: Scintilla is a Latin word that means "spark." In English, it is used metaphorically to refer to a hint or trace of something that suggests its presence.

For example, in a court of law, the "scintilla of evidence" doctrine is used to determine the amount of evidence required to sustain a decision. This means that even the slightest amount of relevant evidence can prevent a motion for a directed verdict or summary judgment from being granted. In other words, if there is even a small amount of evidence supporting a legal claim, the matter will be sent to the jury.

The scintilla of evidence doctrine is rarely used in federal and state courts. Instead, the substantial evidence rule is more commonly used, which requires a party to provide adequate relevant evidence to support a claim.

Overall, scintilla refers to a small amount or hint of something, like a spark that suggests a larger fire.