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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)

alkylate
nounverb-transitiveVery Low
/ˈælkɪleɪt/To introduce an alkyl group into a compound, often referring to a specific petroleum refining process.
alkylating agent
nounC1
/ˈæl.kɪ.leɪ.tɪŋ ˈeɪ.dʒənt/A chemical compound that introduces an alkyl group into another molecule.
alkylating drug
nounLow
/ˈælkɪleɪtɪŋ drʌɡ/A type of chemotherapeutic agent that works by adding an alkyl group to DNA, causing damage and preventing cancer cell reproduction.
alkylation
nounC1
/ˌælkɪˈleɪʃən/A chemical reaction in which an alkyl group is added to a molecule.
alkyne
nounC2
/ˈæl.kaɪn/A hydrocarbon containing at least one carbon–carbon triple bond.
alkyne series
nounVery Low
/ˈælkaɪn ˈsɪəriːz/a homologous series of unsaturated hydrocarbons containing a carbon-carbon triple bond, with the general formula CₙH₂ₙ₋₂
all
adjectiveadverbdeterminer+2A1
/ɔːl/Used to refer to the whole quantity, amount, duration, or extent of something; the entire group, every member.
all blacks
plural-nounB2-C1
/ˌɔːl ˈblæks/The nickname for New Zealand's national senior men's rugby union team.
all clear
nounMedium
/ˌɔːl ˈklɪə/An official signal that a dangerous situation has ended and it is safe to proceed.
all fools' day
nounLow
/ˌɔːl ˈfuːlz ˌdeɪ/April 1st, a day traditionally dedicated to playing practical jokes and hoaxes.
all for love
nounC1/C2
/ɔːl fə ˈlʌv/A state where love is the sole, overwhelming motivation for one's actions, often involving significant sacrifice.
all fours
nounC1
/ˌɔːl ˈfɔːz/A position on hands and knees; to be on all fours.
all on
nounC1
/ɔːl ɒn/to be someone's responsibility or burden; to depend entirely on someone
all quiet on the western front
nounLow
/ɔːl ˈkwaɪət ɒn ðə ˈwɛstən frʌnt/The title of Erich Maria Remarque's seminal 1929 novel about German soldiers' experiences in World War I; metaphorically refers to a state of deceptive calm or stagnation in a difficult situation, especially after intense conflict or activity.
all saints' day
nounLow
/ˌɔːl ˈseɪnts deɪ/A Christian feast day honouring all the saints, known and unknown.
all sorts
plural-nounB1
/ɔːl sɔːts/A wide variety of different kinds of things or people.
all souls' day
nounLow
/ˌɔːl ˈsəʊlz deɪ/A Christian feast day commemorating the faithful departed, observed on 2 November.
all the king's men
nounC1
/ˌɔːl ðə ˈkɪŋz ˈmen/A phrase referring to the complete entourage, supporters, or personnel serving a powerful leader, particularly a monarch, implying the totality of their resources and followers.
all whites
plural-nounLow
/ˌɔːl ˈwaɪts/A nickname or term for the New Zealand national football (soccer) team, derived from their traditional all-white playing kit.
all' ottava
nounLow
/ˌæl ɒˈtɑːvə/A musical instruction indicating that the written notes should be performed one octave higher (or lower if marked 'bassa').

Showing 3201–3220 of 8734 words.