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English Words Starting With A

8,734 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)

antihelix
nounVery Low
/ˌæntiˈhiːlɪks/The inner curved ridge of cartilage in the outer ear, parallel to and inside the helix.
antihemophilic factor
nounVery Low (Specialist Medical Term)
/ˌæntiˌhiːməˈfɪlɪk ˈfæktə/A specific plasma protein (Factor VIII) crucial for blood clotting, deficiency of which causes hemophilia A.
antihero
nounC1/C2
/ˈæntiˌhɪərəʊ/A central character in a story who lacks conventional heroic qualities such as idealism, courage, or morality.
antiheroine
nounC1/C2
/ˌæn.tiˈher.əʊ.ɪn/A female protagonist in a story who lacks conventional heroic qualities such as idealism, courage, or morality, yet engages the audience's sympathy.
antihistamine
nounB2
/ˌæn.tiˈhɪs.tə.miːn/A substance or drug that blocks the effects of histamine in the body, used especially to treat allergy symptoms.
antihistaminic
adjectivenounLow Frequency / Technical
/ˌæn.ti.hɪ.stəˈmɪn.ɪk/A substance that opposes the action of histamine, used to treat allergy symptoms.
antihydrogen
nounC2/Proficient
/ˌæn.tiˈhaɪ.drə.dʒən/The antimatter counterpart of ordinary hydrogen.
antihypertensive
adjectivenounLow-Frequency / Specialized
/ˌæn.ti.ˌhaɪ.pəˈtren.sɪv/A substance or treatment that reduces high blood pressure.
antiknock
adjectivenounC2
/ˌæntiˈnɒk/A substance added to petrol/gasoline to reduce engine knocking (premature combustion).
antikythera
nounC2
/ˌantɪkɪˈθɪərə/A proper noun referring to a small Greek island or, more famously, a complex ancient astronomical calculator found in a shipwreck near it.
antilegomena
nounVery Low
/ˌantɪlɛˈɡɒmɪnə/Writings or statements whose authenticity or canonicity is disputed.
antilepton
nounVery low
/ˌæntiˈlɛptɒn/The antiparticle of a lepton.
antilles
plural-nounLow
/ænˈtɪl.iːz/A group of islands forming the greater part of the West Indies, typically divided into the Greater Antilles (larger islands like Cuba, Jamaica, Hispaniola, Puerto Rico) and the Lesser Antilles (the smaller islands arc from the Virgin Islands south to Trinidad).
antilles current
nounSpecialised
/ænˈtɪliːz ˈkʌrənt/A warm ocean current flowing northwestward along the northern coast of the Caribbean islands.
antilochus
nounVery Low
/ænˈtɪləkəs/Proper noun; a figure in Greek mythology, son of Nestor, known for his speed and loyalty in the Trojan War.
antilock brake
nounC1
/ˈæn.tiˌlɒk breɪk/A safety system in a vehicle that prevents the wheels from locking up during heavy braking, allowing the driver to maintain steering control.
antilog
nounRare / Technical
/ˈæn.tɪ.lɒɡ/A number that represents the value of a logarithm's base raised to the power of a given number; the inverse operation of finding a logarithm.
antilogarithm
nounLow
/ˌantɪˈlɒɡərɪð(ə)m/The number to which a given logarithm corresponds; the inverse operation of taking a logarithm. If log₁₀(a) = b, then a is the antilogarithm of b.
antilogism
nounExtremely rare
/ænˈtɪləˌdʒɪzəm/A logical syllogism where the premises are inconsistent, leading to a contradiction.
antilogy
nounC2/Rare
/ænˈtɪlədʒi/A contradiction in terms or ideas; a statement or proposition that is self-contradictory or logically inconsistent.

Showing 5501–5520 of 8734 words.