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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All 27,237 words
526 words
uranyl
C2
/ˈjʊr.əˌnɪl/
the linear dioxouranium(VI) cation UO2^2+, a common structural unit in uranium(VI) compounds and complexes
cetology
C2+
/siːˈtɑː.lə.dʒi/
the branch of zoology concerned with cetaceans, including whales, dolphins, and porpoises
nonscience
C2
/ˌnɑːnˈsaɪəns/
a subject, practice, or body of claims that is not science or does not use scientific methods
antigalaxy
C2+
/ˌæn.tiˈɡæl.ək.si/
a hypothetical galaxy composed predominantly of antimatter rather than ordinary matter
antideuteron
C2+
/ˌæn.tiˈduː.təˌrɑːn/
the antiparticle of a deuteron, consisting of an antiproton bound to an antineutron
peptone
C2
/ˈpɛptoʊn/
a water-soluble mixture of peptides and amino acids produced by the partial hydrolysis of protein
photomicrograph
C2
/ˌfoʊtəˈmaɪkrəˌɡræf/
a photograph made through a microscope so that a highly magnified subject can be recorded
heterozygousness
C2+
/ˌhɛtəroʊˈzaɪɡəsnəs/
the condition or quality of having two different alleles at a particular genetic locus
polyploidy
C2
/ˈpɑliˌplɔɪdi/
the condition or process of having more than two complete sets of chromosomes in a cell or organism
radiational
C2
/ˌreɪdiˈeɪʃənəl/
relating to, involving, or caused by radiation
infecundity
C2
/ˌɪnfɪˈkʌndəti/
inability or reduced ability to reproduce; lack of fertility
prenewtonian
C2+
/ˌpriːnuˈtoʊniən/
existing before Isaac Newton's work or before the adoption of Newtonian science
pre-Copernican
C2
/ˌpriː.koʊˈpɝː.nɪ.kən/
existing before Nicolaus Copernicus's work or before acceptance of the heliocentric model associated with him
pithecanthropus
C2+
/ˌpɪθɪˈkænθrəpəs/
the former genus Pithecanthropus, especially the Javan fossil hominins now generally classified as Homo erectus
cosmogonal
C2+
/kɑzˈmɑɡənəl/
relating to cosmogony or to a theory about the origin and development of the universe
telegony
C2
/təˈlɛɡəni/
historical genetics: the discredited belief that a female's previous mate can influence offspring later conceived with another mate
prepotency
C2
/ˌpriːˈpoʊtənsi/
an unusual ability of one parent, individual, or strain to transmit its characteristics strongly to offspring
azoic
C2
/eɪˈzoʊɪk/
containing no evidence of life or dating from a time believed to precede life
hybridism
B2
/ˈhaɪbrɪdɪzəm/
the production of hybrids by crossing different species, varieties, or breeds
baryta
C2
/bəˈraɪ.tə/
an older chemical name for barium oxide, or more broadly for certain barium compounds such as barium hydroxide
osculant
C2+
/ˈɑskjələnt/
intermediate between two taxonomic groups and sharing characteristics of each
carbonic acid
C2+
/kɑːrˌbɑːnɪk ˈæsɪd/
a weak acid, H2CO3, formed when carbon dioxide dissolves in water
cosmogonist
C2+
/kɑːzˈmɑːɡənɪst/
a person who studies the origin and development of the universe or proposes a theory about it
bisulfate
C2
/baɪˈsʌl.feɪt/
the hydrogen sulfate ion, HSO4-, which is formed when sulfuric acid loses one proton
nonconductivity
C2+
/ˌnɑːnkənˌdʌkˈtɪvəti/
the property or condition of not transmitting heat, electricity, sound, or another form of energy
homologize
C2
/həˈmɑːlədʒaɪz/
to identify or demonstrate that structures in different organisms correspond because of shared evolutionary origin
serrature
C2
/ˈsɛrətʃɚ/
a row or arrangement of sawlike notches or teeth along an edge
deliquescent
C2
/ˌdɛlɪˈkwɛsənt/
chemistry: absorbing enough moisture from the air to dissolve gradually and form a solution
infusorial
C2
/ˌɪnfjʊˈzɔːriəl/
historical biology: relating to, containing, or formed from Infusoria, a former broad grouping of microscopic aquatic organisms
aeriform
C2+
/ˈerəfɔːrm/
having the nature or physical form of air; gaseous
iodic
C2
/aɪˈɑːdɪk/
relating to iodine, especially to compounds in which iodine has oxidation state +5, such as iodic acid and iodates
parenchymatous
C2
/ˌperənˈkaɪmətəs/
consisting of, relating to, or affecting parenchyma, the functional or softer tissue of an organ
patelliform
C2+
/pəˈteləfɔːrm/
shaped like a shallow dish or a limpet shell
exsert
C2
/ɪkˈsɝːt/
to thrust, extend, or cause a body part or structure to project outward
terraqueous
C2
/təˈreɪkwiəs/
consisting of both land and water, especially in the phrase terraqueous globe for Earth
silicify
C2+
/sɪˈlɪsɪfaɪ/
to convert material into silica or impregnate it with silica, especially during fossilization or rock alteration
labiate
C2+
/ˈleɪbiət/
biology: having lips or lip-like parts, especially a flower whose corolla is divided into two lips
argillocalcareous
C2+
/ɑːrˌdʒɪloʊkælˈkɛriəs/
geology and soil science: consisting of or containing both clay and calcareous material such as calcium carbonate
spiculum
C2
/ˈspɪkjʊləm/
biology: a small sharp needle-like structure, especially a skeletal element of a sponge or other invertebrate
sporule
C2+
/ˈspɔɹjuːl/
rare or historical biology: a small spore, especially one produced by a cryptogam or microorganism
homolog
C2
/ˈhɑːməlɑːɡ/
a biological structure, organ, gene, or other feature that shares a common evolutionary origin with a corresponding feature
cancellate
C2+
/ˈkænsələt/
formed like an open lattice or network, especially of intersecting bars, plates, or bony struts
rugosity
C2
/ruːˈɡɑːsəti/
the quality or degree of being rough, wrinkled, or ridged
pectinate
C2
/ˈpɛktəneɪt/
biology: shaped or arranged like the teeth of a comb
pilus
C2
/ˈpaɪləs/
A hair.
hypophosphite
C2
/ˌhaɪ.poʊˈfɑːs.faɪt/
Any salt of hypophosphorous acid