Exam: TOEFL

Definition: A system that uses radio waves to detect and locate objects, such as airplanes or ships, by analyzing the waves that bounce back from them.

Example: The airplane was detected by radar as it approached the airport.

Definition: The quality of being bright and shining, often associated with light or warmth.

Example: The radiance of the sunset filled the sky with beautiful colors.

Definition: Describing something that gives off light or heat, or is very bright and shining.

Example: The sun was radiant in the clear blue sky.

Definition: A source or point from which light or heat is emitted, often used in astronomy to describe the origin of meteors.

Example: The radiant of the meteor shower was located in the constellation Perseus.

Definition: In a way that shines brightly or is full of light and happiness.

Example: She smiled radiantly at the crowd during her speech.

Definition: Describing something that has rays or is arranged in a radial pattern, often seen in flowers or symmetrical shapes.

Example: The radiate petals of the daisy create a beautiful display in the garden.

Definition: To spread out in straight lines from a central point, like rays of light or heat.

Example: The sun radiates warmth and light to the Earth.

Definition: To send out energy, light, or heat in all directions from a central point.

Example: The sun radiates warmth and light to the Earth.

Definition: The process or result of energy being emitted in the form of rays, waves, or particles, often from radioactive materials.

Example: The scientists studied the effects of radiation on living organisms.

Definition: Relating to the emission or transmission of energy in the form of waves or particles.

Example: The radiational heat from the sun warms the earth.

Definition: Connected to or happening because of radiation, which is the emission of energy as electromagnetic waves or particles.

Example: The radiative heat transfer from the sun warms the earth.

Definition: Relating to fundamental or extreme changes; very different from what is usual or traditional.

Example: The activist proposed a radical approach to address climate change.

Definition: A person who wants major changes in society or politics, often in a revolutionary way.

Example: The radicals organized protests to demand significant reforms in the government.

Definition: To cause someone to adopt extreme views or beliefs, often in a political context.

Example: The group aimed to radicalise young people to support their cause.