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Exam: TOEFL

radioactive

IPA: /ˌreɪ.di.oʊˈæk.tɪv/

KK: /ˌreɪdiəʊˈæktɪv/

adjective

Definition: Relating to or caused by the emission of radiation, often from unstable atomic nuclei.

Example: The radioactive material must be handled with care to avoid exposure.

radioactively

IPA: /ˌreɪdiəʊˈæktɪvli/

KK: /ˌreɪdiəʊˈæktɪvli/

adverb

Definition: In a manner that relates to or involves the emission of radiation from unstable atomic nuclei.

Example: The area was contaminated and is still radioactively unsafe for human habitation.

radioactivity

IPA: /ˌreɪdiəʊˈæktɪvɪti/

KK: /reɪdiəʊˈæktɪvɪti/

noun

Definition: The process by which certain elements or isotopes release energy in the form of radiation due to changes in their atomic structure.

Example: Scientists study radioactivity to understand how it affects the environment and human health.

radiobiological

IPA: //ˌreɪdiəʊbaɪˈɒlədʒɪkəl//

KK: /reɪdiəʊbaɪˈɒlədʒɪkəl/

adjective

Definition: Related to the study of the effects of radiation on living organisms.

Example: The radiobiological effects of the treatment were carefully studied by the researchers.

radiobiologist

IPA: //ˌreɪdiəʊbaɪˈɒlədʒɪst//

KK: /ˌreɪdioʊbaɪˈɑːlədʒɪst/

noun

Definition: A scientist who examines how radiation affects living things.

Example: The radiobiologist conducted experiments to understand the impact of radiation on cells.

radiobiology

IPA: /ˌreɪdiəʊˈbaɪələdʒi/

KK: /reɪdiəʊbaɪˈɒlədʒi/

noun

Definition: The branch of science that studies how radiation affects living things.

Example: Radiobiology helps us understand the impact of radiation on human health.

radiocarbon

IPA: //ˌreɪdiˈkɑːrbən//

KK: /ˈreɪdioʊˌkɑrbən/

noun

Definition: A type of carbon that is radioactive, particularly the isotope known as carbon-14, which is used in dating ancient organic materials.

Example: Scientists use radiocarbon dating to determine the age of archaeological finds.

radiochemical

IPA: /ˌreɪdiəʊˈkɛmɪkəl/

KK: /ˌreɪdiəʊˈkɛmɪkəl/

adjective

Definition: Relating to the study of the chemical effects of radiation or the changes in substances caused by ionizing radiation.

Example: The radiochemical analysis revealed the presence of radioactive isotopes in the sample.

noun

Definition: A substance that includes one or more atoms of a radioactive isotope, often used in scientific research or medical imaging.

Example: The researchers used a radiochemical to trace the movement of the drug in the body.

radiochemically

IPA: /ˌreɪdiəʊˈkɛmɪkli/

KK: /reɪdiˈoʊkɛmɪkli/

adverb

Definition: In a way that relates to the study of the chemical effects of radiation and radioactive substances.

Example: The samples were analyzed radiochemically to determine their isotopic composition.

radiochemist

IPA: /ˈreɪdiəʊˌkɛmɪst/

KK: /ˈreɪdiəʊˌkɛmɪst/

noun

Definition: A scientist who studies the chemical properties and reactions of radioactive substances.

Example: The radiochemist conducted experiments to understand how radioactive materials behave in different environments.

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