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English Words Starting With B

10,030 entries — pick a word to see its definition, pronunciation, and usage.

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Noun Verb Adjective Adverb Plural noun Combining form Verb (transitive)Verb (intransitive)Verb (ambitransitive)

bioethanol
nounC1
/ˌbaɪ.əʊˈeθ.ə.nɒl/A type of ethanol fuel produced from biomass (plant materials).
bioethics
nounC1-C2
/ˌbaɪəʊˈeθɪks/The study of the ethical issues arising from biological research, medical advances, and their application, especially in biotechnology and medicine.
biofact
nounRare / Specialized
/ˈbaɪəʊfækt/An object or material from a past organism that provides biological information but is not itself a traditional fossil (e.g., hair, shell, bone).
biofeedback
nounLow
/ˌbaɪ.əʊˈfiːd.bæk/A therapeutic technique that uses electronic monitoring to train individuals to gain voluntary control over physiological processes such as heart rate, muscle tension, and brainwave activity.
bioflavonoid
nounLow
/ˌbaɪəʊˈfleɪvənɔɪd/A type of plant pigment with antioxidant properties, often found in citrus fruits and other plants.
biofog
nounRare
/ˈbaɪ.əʊ.fɒɡ/A state of mental fatigue or confusion often attributed to dietary choices, lifestyle factors, or biological causes such as gut health or hormonal imbalances.
biofortification
nounC1
/ˌbaɪəʊˌfɔːtɪfɪˈkeɪʃən/The process of increasing the nutritional value of food crops through biological means, such as conventional breeding or genetic engineering.
biofouling
nounRare/Low
/ˌbaɪəʊˈfaʊlɪŋ/The accumulation of living organisms (like algae, barnacles, molluscs) on a submerged surface, typically causing operational problems.
biofuel
nounB2
/ˈbaɪəʊˌfjuːəl/A fuel, such as ethanol or biodiesel, derived directly from living matter, typically plant material.
biog
abbreviationnounC1
/ˈbaɪ.ɒɡ/A short, informal, or journalistic written account of a person's life.
biogas
nounB2
/ˈbaɪ.əʊ.ɡæs/A type of fuel gas produced by the anaerobic digestion or fermentation of organic matter, such as manure, sewage, or plant material.
biogasification
nounLow
/ˌbaɪ.əʊˌɡæs.ɪ.fɪˈkeɪ.ʃən/The technological process of converting organic matter into biogas through anaerobic digestion.
biogen
nounLow (Specialised)
ˈbaɪ.əʊ.dʒənA biological agent, product, or technology, especially a biotechnology company.
biogenesis
nounC1/C2
/ˌbaɪəʊˈdʒɛnɪsɪs/The principle that living organisms originate only from other living organisms.
biogenetics
nounLow
/ˌbaɪ.əʊ.dʒəˈnet.ɪks/The branch of biology that deals with the study of heredity and genetic variation in living organisms.
biogeochemistry
nounC2
/ˌbaɪ.əʊˌdʒiː.əʊˈkem.ɪ.stri/The scientific study of the chemical, physical, geological, and biological processes and reactions that govern the composition of the natural environment.
biogeography
nounC1/C2
/ˌbaɪ.əʊ.dʒiˈɒɡ.rə.fi/The scientific study of the geographical distribution of living organisms and the factors influencing these distributions.
biograph
nounverb-transitiveVery Low / Archaic / Historical
/ˈbaɪ.əʊ.ɡrɑːf/A now largely obsolete or brand-specific term meaning 'to take a photograph' or 'to produce a photograph', often referring to early motion picture technology.
biographee
nounLow
/baɪˈɒɡ.rə.fiː/The person whose life is the subject of a biography.
biographer
nounC1
/baɪˈɒɡ.rə.fə/A person who writes an account of someone else's life.

Showing 4461–4480 of 10030 words.