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English Words Starting With A

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

arse about
verbLow to medium
/ɑːs əˈbaʊt/To behave in a disorganized, inefficient, or foolish way; to mess around.
arse licker
nounLow to Medium
/ˈɑːs ˌlɪk.ə/A person who acts obsequiously or fawningly towards someone in authority in order to gain advantage; a sycophant.
arsenal
nounB2
/ˈɑː.sən.əl/A place where weapons and military equipment are stored or manufactured.
arsenate
nounLow
/ˈɑːs(ə)nət/A chemical compound containing the arsenate ion, typically a salt or ester of arsenic acid.
arsenic
adjectivenounC1
/ˈɑːs(ə)nɪk/A highly poisonous metallic element (symbol As).
arsenic acid
nounC1/C2
/ˌɑː.sən.ɪk ˈæs.ɪd/A highly toxic, crystalline inorganic acid with the chemical formula H₃AsO₄.
arsenic disulfide
nounC2 (Very Low Frequency / Technical)
/ˈɑː.sən.ɪk daɪˈsʌl.faɪd/A bright red or orange-yellow mineral compound with the chemical formula As₂S₂, known historically for its use as a pigment and in pyrotechnics.
arsenic trichloride
nounVery Low (Technical/Specialized)
/ˌɑː.sən.ɪk traɪˈklɔː.raɪd/A highly toxic, colourless to yellow oily liquid with the chemical formula AsCl₃, formed from arsenic and chlorine.
arsenic trioxide
nounC2
/ˈɑː.sən.ɪk traɪˈɒk.saɪd/A highly toxic, white crystalline compound with the chemical formula As₂O₃.
arsenic trisulfide
nounVery Low (C2/Technical)
/ˌɑː.sən.ɪk traɪˈsʌl.faɪd/A bright yellow or orange-yellow chemical compound with the formula As₂S₃, also known as the mineral orpiment.
arsenical
adjectivenounC2
/ɑːˈsɛnɪk(ə)l/Relating to or containing arsenic.
arsenide
nounLow
/ˈɑː.sɪ.naɪd/A compound in which arsenic is combined with a more electropositive element.
arsenite
nounVery Low
/ˈɑːsənaɪt/A salt or ester of arsenious acid, containing the anion AsO₃³⁻.
arseno group
nounVery Low
/ˈɑːsɪnəʊ ɡruːp/A chemical functional group derived from arsenic, specifically the -AsH₂ group or its derivatives, where arsenic is bonded to organic molecules.
arsenolite
nounVery Rare
/ɑːˈsɛnəlaɪt/A naturally occurring mineral, a form of arsenic trioxide.
arsenopyrite
nounVery Low (C2)
/ˌɑː.sə.nəʊˈpaɪ.raɪt/A hard, silver-white mineral composed of iron, arsenic, and sulfur (FeAsS), with a metallic lustre, also known as mispickel. It is an important ore of arsenic and sometimes yields gold.
arsenous acid
nounC2/Technical
/ˈɑːsənəs ˈæsɪd/A specific, unstable inorganic acid (H₃AsO₃), existing in solution, derived from arsenic trioxide. It is a toxic chemical compound and a precursor to arsenites.
arshin
nounVery Low
/ɑːˈʃiːn/A traditional unit of linear measurement used in Russia and other Turkic regions, equal to approximately 28 inches (71.12 cm).
arsine
nounC2/Extremely Rare
/ˈɑːsiːn/A poisonous, flammable gas (AsH₃) with a faint garlic-like odour, composed of arsenic and hydrogen.
arsino group
nounExtremely low/Very technical
/ɑːˈsiːnəʊ ɡruːp/A univalent chemical group derived from arsine, with the formula –AsH₂.

Showing 6941–6960 of 8734 words.