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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)

biosynthesis
nounC2
/ˌbaɪəʊˈsɪnθəsɪs/The production of complex molecules within living organisms or cells.
biosystematics
nounC1-C2 / Very Low Frequency
/ˌbaɪəʊˌsɪstɪˈmætɪks/The branch of biology concerned with the classification of organisms and the relationships between them based on genetic, ecological, and evolutionary data.
biot-savart law
nounC2
/ˌbiːəʊ səˈvɑː lɔː/A fundamental law of magnetostatics that describes the magnetic field generated by a steady electric current.
biota
nounC1
/baɪˈəʊ.tə/The animal and plant life of a particular region, habitat, or geological period.
biotech
nounB2
/ˈbaɪ.əʊ.tek/The commercial application of living organisms, or their biological processes, to develop products and technologies.
biotechnology
nounB2/C1
/ˌbaɪ.əʊ.tekˈnɒl.ə.dʒi/The use of living organisms or their biological processes to develop or make useful products, especially in industry, medicine, and agriculture.
biotelemetry
nounLow
/ˌbaɪ.əʊ.tɪˈlem.ə.tri/The remote measurement and transmission of biological data from a living organism.
bioterrorism
nounLow
/ˌbaɪəʊˈtɛrəˌrɪz(ə)m/The intentional release of biological agents (bacteria, viruses, or toxins) to harm or terrorize a population.
biotic factor
nounLow
/baɪˈɒt.ɪk ˈfæk.tə/Any living component of an ecosystem that affects another organism or shapes the environment.
biotic potential
nounC2
/baɪˌɒt.ɪk pəˈten.ʃəl/The maximum reproductive capacity of a species or population under optimal environmental conditions, with no limitations on resources or other constraints.
biotin
nounLow (technical/scientific context), rising in wellness/beauty consumer contexts.
/ˈbaɪ.ə.tɪn/a water-soluble vitamin of the B complex, also known as vitamin B7 or vitamin H, essential for metabolism of fats, carbohydrates, and amino acids.
biotite
nounC2/Technical
/ˈbaɪətaɪt/A dark-colored, iron- and magnesium-rich mineral of the mica group, commonly found in igneous and metamorphic rocks.
biotope
nounC2
/ˈbaɪ.ə(ʊ).təʊp/A specific, uniform habitat area defined by its environmental conditions, supporting a characteristic community of organisms.
biotransformation
nounLow
/ˌbaɪəʊˌtrænsfəˈmeɪʃ(ə)n/The chemical modification(s) of a compound within a living organism.
biotron
nounRare / Technical
/ˈbaɪəʊtrɒn/A large, controlled-environment facility for growing organisms under specific conditions.
biotroph
nounC2/Extremely Rare (Specialist)
/ˈbaɪəʊˌtrɒf/An organism that obtains nutrients from living host cells without killing them immediately.
bioturbation
nounVery low
/ˌbaɪəʊtɜːˈbeɪʃən/The disturbance of sedimentary deposits by living organisms.
biotype
nounLow
/ˈbaɪəʊtaɪp/A distinct biological form or strain of an organism, often defined by shared physiological, genetic, or ecological characteristics.
biovar
nounVery Low (C2+ Technical)
/ˈbaɪ.əʊ.vɑː/A strain or type of microorganism (like a bacterium) that is distinguished from others of the same species based on its specific biochemical or physiological characteristics.
biowarfare
nounC1/C2
/ˈbaɪ.əʊˌwɔː.feə/The use of biological agents (such as bacteria, viruses, or toxins) as weapons in warfare to cause disease or death in humans, animals, or plants.

Showing 4581–4600 of 10030 words.