Law enforcement officers seized several controlled substances during the traffic stop.

The lab identified a rare chemical substance that could revolutionize battery technology.

When a minnow is injured, the alarm substance released from its skin causes nearby fish to flee.

After losing his job, he struggled with substance abuse before finding help.

The laboratory was shut down after inspectors discovered an unregistered controlled substance stored without proper documentation.

During the inflammatory response, substance P is released from sensory neurons and amplifies pain signaling.

In determining the constitutionality of the statute, the court focused on the pith and substance of the law rather than its incidental effects.

To determine the amount of substance in the sample, the chemist measured the number of moles of the solute present.

Substance-wise, the new policy offers little improvement over the old one.

The laboratory confirmed that the sample was an elementary substance composed solely of hydrogen molecules.