Which safety signal word indicates that a pesticide is slightly toxic or relatively nontoxic?

The term that indicates a pesticide is slightly toxic or relatively nontoxic is "Caution." This signal word is part of the labeling system used to convey the level of toxicity associated with pesticide products. "Caution" suggests that the substance poses a lower risk of harm compared to those labeled with "Warning" or "Danger."

"Warning" typically indicates moderate toxicity, while "Danger" signifies high toxicity and a more significant risk to health. The term "Nontoxic," although it may imply safety, is not a standardized safety signal word according to pesticide labeling regulations. In summary, "Caution" effectively conveys that while the pesticide should still be handled with care, it presents a lower risk of toxicity than more hazardous options.