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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)

aquaponics
nounLow
/ˌæk.wəˈpɒn.ɪks/A sustainable food production system that combines aquaculture (raising fish) with hydroponics (growing plants in water without soil) in a symbiotic environment.
aquaporin
nounLow/Technical
/ˌæk.wəˈpɔː.rɪn/A specialized protein embedded in a cell membrane that selectively facilitates the passage of water molecules into and out of the cell.
aquarelle
nounLow (specialist/formal)
/ˌæk.wəˈrɛl/A painting or picture made with transparent watercolours.
aquarian
adjectivenounC2
/əˈkwɛə.ri.ən/relating to the zodiac sign Aquarius; of or characteristic of an Aquarian (a person born under Aquarius)
aquarids
nounRare
/ˈækwərɪdz/A name for two specific meteor showers that appear to radiate from the constellation Aquarius.
aquarist
nounC2
/ˈæk.wər.ɪst/A person who keeps an aquarium, especially as a hobby.
aquarium
nounB1
/əˈkweə.ri.əm/A transparent tank or container, often made of glass, in which water-dwelling plants and animals (especially fish) are kept for display.
aquarius
adjectivenounC1
/əˈkweə.ri.əs/The eleventh sign of the zodiac, represented by the Water Bearer.
aquashow
nounLow
/ˈæk.wə.ʃəʊ/A theatrical performance or exhibition held in a swimming pool or large water tank, featuring synchronized swimming, diving, water acrobatics, and sometimes aquatic animals.
aquatic
adjectivenounB2
/əˈkwæt.ɪk/Relating to, living in, or found in water.
aquatics
plural-nounB1
/əˈkwætɪks/Activities and sports performed in or on water.
aquatint
nounverbverb-ambitransitiveC2 / Rare / Specialized
/ˈæk.wə.tɪnt/A printmaking technique in which tone is created by etching a metal plate through a porous ground, producing effects resembling watercolour or wash drawings.
aquatone
nounVery Low
/ˈæk.wə.təʊn/A monochrome print made using a photographic process involving a water-based solution, typically producing a soft, continuous-tone image.
aquavit
nounLow
/ˈæk.wə.viːt/A clear Scandinavian spirit flavoured with caraway seeds and other herbs.
aqueduct
nounC1
/ˈæk.wɪ.dʌkt/A man-made channel or bridge-like structure, often elevated on arches, used for conveying water over a distance.
aqueduct of sylvius
nounC2
/ˈækwɪdʌkt əv ˈsɪlvɪəs/A narrow canal within the midbrain that connects the third and fourth ventricles, allowing cerebrospinal fluid to flow between them.
aqueous humor
nounLow
/ˌeɪ.kwi.əs ˈhjuː.mər/The clear, watery fluid filling the space between the cornea and the lens of the eye.
aqueous humour
nounC2
/ˌeɪ.kwi.əs ˈhjuː.mə/The clear, watery fluid that fills the space between the cornea and the lens of the eye, maintaining intraocular pressure and nourishing the cornea and lens.
aquiclude
nounVery Low
/ˈækwɪkluːd/A geological formation that can absorb water but does not transmit it at a sufficient rate to be a source for wells or springs.
aquiculture
nounC1
/ˈækwɪˌkʌltʃə/The controlled cultivation of aquatic organisms, particularly for food.

Showing 6181–6200 of 8734 words.