English Vocabulary
Pick a CEFR level (A1–C2) — A1 is the friendliest place to start — and browse its words grouped by topic: travel, food, the body, emotions, and more. Each word shows its meaning, example sentences, and US/UK pronunciation.
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32 words
lab
B1
/læb/
A room or building equipped for scientific work; short for laboratory.
theory
B1
/ˈθɪ.ɹi/
A set of ideas that explains how or why something happens, supported by evidence.
reaction
B1
/ɹiˈækʃən/
The way you behave or feel because of something that has happened.
experiment
B1
/ɪkˈspɛɹ.ə.mənt/
A scientific test done to discover something or to check whether an idea is true.
oxygen
B1
/ˈɑk.sɪ.d͡ʒən/
A colourless, odourless gas that humans and animals need to breathe and that makes up part of the air.
discovery
B1
/dɪsˈkʌv(.ə).ɹi/
Something that is found or learned for the first time.
analysis
B1
/əˈnæl.ə.sɪs/
The careful study of something by examining its parts in detail.
react
B1
/ɹiːˈækt/
To behave in a particular way because of something that has happened.
formula
B1
/ˈfɔɹ.mjə.lə/
A mathematical or scientific rule written with symbols.
element
B1
/ˈɛləmənt/
One of the parts that together make up a whole.
genetic
B1
/d͡ʒəˈnɛt.ɪk/
Relating to genes or to the genes you inherit from your parents.
physics
B1
/ˈfɪz.ɪks/
The science that studies matter, energy, and how they affect each other.
chemistry
B1
/ˈkɛm.ɪ.stɹi/
The science that studies what substances are made of and how they change.
allergic
B1
/əˈlɝ.d͡ʒɪk/
Having a bad physical reaction to a particular substance.
laboratory
B1
/ˈlæb(ə)ɹəˌtɔɹi/
A room or building equipped for scientific research, experiments, or analysis.
biology
B1
/baɪˈɑ.lə.d͡ʒi/
The science that studies living things such as plants and animals.
breakthrough
B1
/ˈbɹeɪk.θɹuː/
An important discovery or sudden advance that overcomes a major obstacle.
reactor
B1
/ɹiˈæktɚ/
A person who responds to a suggestion, stimulation or other influence.
plasma
B1
/ˈplæzmə/
(physical chemistry) a fourth state of matter distinct from solid or liquid or gas and present in stars and fusion reactors
meteor
B1
/ˈmiːtiɚ/
a streak of light produced when a small piece of matter from space enters Earth's atmosphere and becomes intensely hot
enthusiastic
B1
/ɪnˌθuːziˈæstɪk/
Showing great excitement and interest in something.
extinction
B1
/ɪkˈstɪŋkʃən/
The situation in which a species or group no longer exists.
molecular
B1
/məˈlɛk.jə.ləɹ/
relating to or produced by or consisting of molecules
dioxide
B1
/daɪˈɑksaɪd/
A chemical compound that has two oxygen atoms in each molecule.
genetics
B1
/ˈdʒɛ.nə.ʈɪks/
The branch of biology that studies how characteristics are passed from parents to children.
biologist
B1
/baɪˈɑː.lə.dʒɪst/
a scientist who studies living organisms and the processes of life
molecule
B1
/ˈmɑ.lɪ.kjul/
The smallest unit of a substance that still has all its chemical properties, made of two or more atoms joined together.
orbital
B1
/ˈɔrbɪtəl/
relating to an orbit or to motion around another body
geology
B1
/d͡ʒiˈɑ.lə.dʒi/
The science that studies the structure of the earth and its rocks.
geologist
B1
/d͡ʒiˈɑːlədʒɪst/
a specialist in geology
oxide
B1
/ˈɑksaɪd/
a chemical compound of oxygen with another element
science fiction
B1