What term refers to a trace amount of something?

The term "scintilla" refers to a very small or trace amount of something. It is often used in legal and academic contexts to signify a minute quantity that may be significant in discussions, such as evidence or persuasive arguments. In many legal situations, even a scintilla of evidence can be enough to meet a threshold, suggesting its importance in deliberations.

The other terms have different meanings. "Peppercorn" is often used to denote a nominal value, typically in legal contexts, especially in contracts, where it symbolizes consideration provided for an agreement. "Scrap" generally refers to waste material, usually metal, or pieces that are leftover. "Particulate" denotes small particles, often in a scientific context, involving tiny separate pieces but doesn’t directly refer to a trace amount like scintilla does. Hence, the appropriate term for a trace amount is indeed "scintilla."