Exam: TOEFL

Definition: A very small particle that is less than 100 nanometers in size, often used in science and technology.

Example: Researchers are studying the effects of nanoparticles in medicine.

Definition: Referring to a size or scale that is measured in nanometers, which are one billionth of a meter.

Example: The researchers are studying nanoscale materials to improve the efficiency of solar cells.

Definition: A unit of time equal to one billionth of a second, often used to measure very short durations.

Example: The computer processes data in nanoseconds, making it extremely fast.

Definition: The field of science that involves creating and using very small devices and materials at the level of atoms and molecules.

Example: Nanotechnology is being used to develop new medical treatments and materials.

Definition: A very small tube made of carbon atoms arranged in a cylindrical shape, known for its strength and electrical properties.

Example: Researchers are studying the use of nanotubes in electronics and materials science.

Definition: To sleep for a short time, usually during the day.

Example: After lunch, I like to take a nap to recharge my energy.

Definition: A short sleep taken during the day, usually lasting a few minutes to a couple of hours.

Example: After lunch, I like to take a quick nap to recharge my energy.

Definition: To cover a dish with a sauce or to create a soft surface on fabric or leather.

Example: The chef napped the dish with a rich gravy before serving it.

Definition: A white solid substance made from coal tar or petroleum, often used to make dyes, moth repellents, and explosives.

Example: The mothballs in the closet contained naphthalene to keep the insects away.

Definition: Relating to a type of hydrocarbon compound known as naphthenes, which are typically found in crude oil and are characterized by their ring structure.

Example: The naphthenic acids in the oil can cause corrosion in pipelines.

Definition: A type of gold coin that was used in France, worth 20 francs, and named after the French leader Napoleon Bonaparte.

Example: He found an old napoleon coin while cleaning the attic.

Definition: A type of treatment that focuses on healing by manipulating joints, muscles, and ligaments, based on the idea that many health issues arise from problems with connective tissues.

Example: After her injury, she decided to try naprapathy to help with her recovery.