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English Words Starting With B

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

beta crucis
nounVery Low
/ˈbiːtə ˈkruːsɪs/The second brightest star in the constellation Crux (the Southern Cross).
beta decay
nounLow (Technical/Scientific)
/ˈbiːtə dɪˈkeɪ/A type of radioactive decay in which an atomic nucleus emits a beta particle (an electron or positron), transforming into a nucleus of a different element.
beta function
nounLow (Specialized Technical Term)
/ˈbiːtə ˌfʌŋk.ʃən/A specific mathematical function, denoted B(x,y), defined by the integral B(x,y) = ∫₀¹ t^(x-1) (1-t)^(y-1) dt for positive real numbers x and y, closely related to the gamma function.
beta globulin
nounVery low
/ˈbiːtə ˈɡlɒbjʊlɪn/A type of globulin protein found in blood plasma, involved in various physiological functions including transport and immune response.
beta iron
nounRare / C2
/ˈbiːtə ˈaɪən/A non-magnetic, high-temperature crystalline form of pure iron.
beta israel
nounLow Frequency / Specialized
/ˌbeɪtə ˈɪzreɪəl/A term for the Ethiopian Jewish community, the historical Jewish population of Ethiopia.
beta male
nounC1
/ˈbiːtə ˌmeɪl/A man perceived as unassertive, submissive, or lacking the dominant traits traditionally associated with masculinity in a social hierarchy.
beta particle
nounLow
/ˈbiːtə ˌpɑːtɪk(ə)l/A high-energy, high-speed electron or positron emitted during the radioactive decay of an atomic nucleus.
beta ray
nounC2
/ˈbiːtə ˌreɪ/A stream of beta particles (high-energy electrons or positrons) emitted by radioactive decay.
beta receptor
nounLow
/ˈbiːtə rɪˌseptə/A type of cell surface receptor that binds hormones like adrenaline and noradrenaline (catecholamines), mediating physiological responses such as increased heart rate, relaxation of smooth muscle, and breakdown of fat.
beta rhythm
nounVery Low (Technical Term)
/ˈbiːtə ˌrɪðəm/A type of brain wave pattern, typically with a frequency between 13-30 Hz, associated with normal waking consciousness, alertness, and active thinking.
beta stock
nounC1
/ˈbiːtə stɒk/The stock of a company that is in the testing and development phase before a full public release; a share in a company that has not yet reached a stable, proven state.
beta structure
nounC1/C2 (Technical)
/ˈbiːtə ˈstrʌkʧə/A secondary, sheet-like structural arrangement of amino acid chains in a protein, formed by hydrogen bonds between the chains.
beta test
nounverbMedium
/ˈbiːtə ˌtest/A second-stage test of a product (especially software) by a limited group of users outside the developing company before its general release.
beta version
nounMedium
/ˈbiːtə ˌvɜːʒ(ə)n/An early, incomplete, and testable release of software, a product, or a service, made available to a limited group of users to identify problems and gather feedback before the final release.
beta-blocker
nounB2-C1
/ˈbiːtə ˌblɒkə/A type of medication that blocks the effects of adrenaline (especially on beta receptors), used to treat heart conditions, high blood pressure, and anxiety.
beta-endorphin
nounC2
/ˌbiːtə ɛnˈdɔːfɪn/An endogenous opioid peptide neurotransmitter and hormone, produced primarily by the pituitary gland, that acts as a natural pain reliever and is associated with feelings of well-being.
beta-indoleacetic acid
nounVery low (Technical/Specialist)
/ˌbeɪtə ˌɪndəʊləˈsiːtɪk ˈæsɪd/A specific isomer of indole-3-acetic acid (IAA), a naturally occurring auxin (plant hormone) that regulates growth and development.
beta-naphthylamine
nounVery low / Specialized
/ˌbiːtə næfˈθɪləˌmiːn/A specific aromatic amine, derivative of naphthalene, used as an intermediate in dye production.
beta-oxidation
nounVery low frequency
ˈbiːtə ˌɒksɪˈdeɪʃənThe metabolic process of breaking down fatty acids into acetyl-CoA units in cell mitochondria.

Showing 3681–3700 of 10030 words.