Exam: TOEFL

Definition: Relating to or activated by a chemical in the brain called dopamine, which plays a key role in mood and behavior.

Example: Certain medications are dopaminergic, meaning they affect the levels of dopamine in the brain.

Definition: A material added in small quantities to another substance to change its properties, especially in electronics to improve conductivity.

Example: Boron is often used as a dopant in silicon to enhance its electrical properties.

Definition: Describing something that has been treated with a substance, often to enhance performance or appearance, or referring to being under the influence of drugs.

Example: The athlete was disqualified for competing while doped.

Definition: To have given someone or something a drug, often to enhance performance or alter behavior.

Example: The athlete was doped before the competition, which led to a scandal.

Definition: The act of using drugs or other substances to enhance athletic performance, often in a way that is against the rules of sports.

Example: The athlete was banned for doping after testing positive for a banned substance.

Definition: A person who looks very similar to another person, often referred to as a double or look-alike.

Example: She met her doppelganger at the party, and they couldn't believe how much they looked alike.

Definition: A state of being inactive or resting, where something is not growing or developing.

Example: During the winter, many plants enter a period of dormancy to survive the cold weather.

Definition: In a state of rest or inactivity, where growth or development has stopped, but the potential for activity remains.

Example: The seeds remain dormant until the conditions are right for germination.

Definition: A building or room where many people sleep, often found in schools or colleges.

Example: After a long day of classes, the students returned to their dormitory to relax and study.

Definition: Relating to or located at both the back and the sides of something.

Example: The dorsolateral region of the brain plays a crucial role in decision-making.

Definition: The back part of something, especially the upper surface of an organ or limb.

Example: The doctor examined the dorsum of the patient's foot for any signs of injury.