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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)

ami
nounVery Low
/ˈæmiː/ or /aˈmiː/A friend (male); a close companion or associate.
amianthus
nounVery Rare / Obsolete Technical Term
/ˌæmɪˈænθəs/A fine, silky variety of asbestos, typically used historically for its fibrous, fire-resistant qualities.
amicable number
nounVery low
/ˌæm.ɪ.kə.bəl ˈnʌm.bər/A pair of numbers where each is the sum of the proper divisors of the other.
amice
abbreviationnounVery Low
/ˈamɪs/A liturgical vestment, specifically a rectangular piece of white linen worn over the shoulders of clergy beneath other vestments, such as an alb or chasuble.
amici prism
nounTechnical / Very Low
/əˌmiːtʃi ˈprɪzəm/A compound optical prism made from two prisms of different glass types (often crown and flint) cemented together, designed to produce dispersion without deviation.
amicus curiae
nounLow
/əˌmiːkəs ˈkjʊəriːaɪ/An individual or organization, not a party to a legal case, who offers information or expertise to assist the court in reaching its decision.
amicus humani generis
nounVery Low
/əˌmiːkəs hjuːˌmɑːni ˈdʒɛnərɪs/A friend of the human race; a philosophical or literary term for a philanthropist or benevolent person.
amicus usque ad aras
nounVery Low (E2)
/əˌmiːkʊs ˌʊskweɪ æd ˈɑːrɑːs/A friend to the very altars (i.e., a friend to the last extremity or up to the point of religious conflict or sacrifice).
amida
nounLow (Specialized)
/əˈmiːdə/A central figure in Pure Land Buddhism, the Buddha of Infinite Light and Life, upon whose vows and compassion practitioners rely for salvation.
amidah
nounLow (Specialized term within religious contexts)
/əˈmiːdə/The central standing prayer of Jewish liturgy, recited silently while facing Jerusalem.
amidase
nounVery Low (Specialist)
/ˈæmɪdeɪz/An enzyme that catalyzes the hydrolysis of amides, releasing ammonia and a carboxylic acid.
amidate
verb-transitiveVery Low / Specialized
/ˈæmɪdeɪt/To convert a chemical compound, typically an acyl chloride or nitrile, into an amide.
amide
nounC2
/ˈeɪ.maɪd/A compound derived from ammonia by replacement of a hydrogen atom by a metal, or from an acid by replacement of the hydroxyl group by -NH₂, -NHR, or -NR₂.
amidin
nounVery low
/ˈæmɪdɪn/A specific type of chemical compound, specifically a base derived from an amine by substitution of an amidine group; the term refers to a nitrogenous organic compound in biochemistry.
amidine
nounVery Rare / Technical
/ˈæm.ɪ.diːn/A specific class of organic chemical compounds containing the functional group RC(=NR')NR''.
amidinohydrazone
nounVery Low (Highly Specialised)
/ˌæmɪdaɪnəʊˈhaɪdrəzəʊn/A specific type of organic compound with the characteristic structure of a hydrazone group attached to an amidine group.
amidogen
nounC2
/ˈæmɪdəʊdʒɛn/A hypothetical bivalent radical, NH₂, derived from ammonia.
amidol
nounRare / Technical
/ˈæmɪdɒl/A specific chemical compound, a colorless crystalline solid, used primarily in developing photographic solutions.
amie
nounVery Low
/ˈæmɪ/A female friend; a girlfriend.
amiens
nounLow
/ˈæm.i.ɒ̃/ or /ˈæm.i.ənz/A city in northern France, capital of the Somme department.

Showing 4041–4060 of 8734 words.