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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)

arcata
nounVery Low
/ɑːˈkɑːtə/A proper noun referring to a specific city in Humboldt County, California, United States, known for its redwood forests, university, and progressive community.
arcature
nounLow (Specialized Architectural Term)
/ˈɑːkətʃə/A series or row of arches, especially a small, decorative arcade.
arce
nounVery Low
/ˈɑːsi/A genus of trees commonly known as maples.
arcella
nounVery Low / Technical
/ɑːˈsɛlə/A type of testate (shelled) amoeba belonging to the genus Arcella, characterized by a discoid or hemispherical shell with a central aperture.
arcesilaus
nounVery Rare
/ˌɑːsɪˈsaɪləs/A proper noun referring to the name of several figures in classical antiquity, most notably Arcesilaus of Pitane, the founder of the Middle Academy and a major Skeptic philosopher in Ancient Greece.
arcesius
nounExtremely Rare
/ɑːˈsiːsɪəs/A proper noun referring to a figure in Greek mythology, specifically the father of Laertes and grandfather of Odysseus.
arch
nounverbverb-intransitive+1B2
/ɑːtʃ/a curved structure that spans an opening and supports weight from above.
arch beam
nounC2
/ɑːtʃ biːm/A structural member in the shape of an arch, spanning a space and resisting loads primarily through compression.
arch board
nounLow
/ɑːtʃ bɔːd/A structural board positioned above or as part of an architectural arch or curved structure; a curved or specially shaped board in construction or furniture-making.
arch brace
nounC2
/ɑːtʃ breɪs/A diagonal structural member that supports or strengthens an arch, connecting a point on the arch to a point on the support or another arch.
arch dam
nounLow (Technical)
/ˌɑːtʃ ˈdæm/A concrete dam curved upstream in plan, which uses its curved shape to transfer the water's pressure to its abutments (the rock or earth at its sides).
arch head
nounB2
/ɑːtʃ/a curved symmetrical structure spanning an opening, often supporting weight; or a chief, principal, or leading figure.
arch support
nounC1
/ɑːtʃ səˈpɔːt/A device (usually an insert for a shoe) designed to support the arch of the foot, relieving pressure and providing comfort.
archaea
plural-nounC1+
/ɑːˈkiːə/A domain of single-celled microorganisms that are genetically distinct from bacteria and eukaryotes, often found in extreme environments.
archaebacteria
plural-nounC2
/ˌɑːkɪbækˈtɪəriə/A major group of microorganisms constituting one of the three domains of life, distinct from true bacteria and eukaryotes.
archaeoastronomy
nounC2
/ˌɑː.ki.əʊ.əˈstrɒn.ə.mi/The scientific study of how ancient peoples understood and used astronomical phenomena, and what role the sky played in their cultures.
archaeobotany
nounVery Low
/ˌɑː.ki.əʊˈbɒt.ən.i/The scientific study of ancient plant remains recovered from archaeological sites.
archaeocyathid
nounVery rare / Technical
/ˌɑːkɪəʊˈsaɪəθɪd/An extinct, vase-shaped marine organism from the Cambrian period, part of an early reef-building group of sponges or sponge-like animals.
archaeologist
nounC1
/ˌɑː.kiˈɒl.ə.dʒɪst/A person who studies human history and prehistory through the excavation of sites and the analysis of artefacts and other physical remains.
archaeology
nounB2
/ˌɑː.kiˈɒl.ə.dʒi/The scientific study of human history and prehistory through the excavation and analysis of physical remains like artifacts, structures, and fossils.

Showing 6381–6400 of 8734 words.