Laboratory Animals

noun a small rodent with a long tail, known for being a pest in many urban areas

• The scientist conducted a study on the behavior of the rat in a controlled environment.
• I saw a rat scurrying across the street last night.
• That guy is such a rat, always trying to cheat his way out of things.
• She felt like a rat trapped in a maze, unable to find her way out of the complicated situation.

noun a small mammal characterized by large front teeth for gnawing and a typically long tail

• The scientist conducted a study on the behavior of the rodent species in the laboratory.
• I saw a cute little rodent scurrying around in the park yesterday.
• Watch out for those pesky rodents in the attic, they can cause a lot of damage.
• The politician was compared to a rodent, sneaking around and causing trouble behind the scenes.