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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)

apology
nounC1
/əˈpɒlədʒi/A formal statement expressing regret or remorse for an offence or failure.
apolune
nounVery Low (Technical)
/ˈapə(ʊ)luːn/The point in the orbit of a spacecraft or other object around the moon where it is farthest from the moon's center.
apomict
nounC2
/ˈæp.ə.mɪkt/An organism that reproduces through apomixis, i.e., by producing seeds or embryos without fertilization.
apomixis
nounRare
/ˌæpəˈmɪksɪs/A type of reproduction without fertilisation where seeds develop from maternal tissue only.
apomorphine
nounLow
/ˌapə(ʊ)ˈmɔːfiːn/A dopamine agonist medication derived from morphine, primarily used in the treatment of Parkinson's disease to relieve 'off' periods of immobility.
apomorphy
nounVery rare
/ˈapə(ʊ)ˌmɜːfi/In biology (especially cladistics/phylogenetics), a derived trait or character state that is present in an organism or group but absent in their common ancestor; a novel evolutionary feature.
aponeurosis
nounLow/Very Specialized
/ˌapənjʊˈrəʊsɪs/A sheet-like fibrous membrane, resembling a flat, wide tendon, that serves to connect a muscle to a bone or to other tissues.
apopemptic
adjectivenounObsolete / Extremely Rare
/ˌæpəʊˈpɛm(p)tɪk/Pertaining to a departure or farewell; of or relating to sending someone away.
apophasis
nounC2
/əˈpɒfəsɪs/A rhetorical device where a speaker brings up a subject by denying that it should be brought up, or mentions something while claiming not to mention it.
apophis
nounVery Low
/əˈpəʊfɪs/A proper noun, specifically the name given to a specific near-Earth asteroid (99942 Apophis).
apophony
nounLow (C2)
/əˈpɒfəni/A systematic alternation or change in vowel quality within a root or stem to express grammatical distinctions (like tense, number, or part of speech).
apophthegm
nounC2 / Very low frequency
/ˈæp.ə.θem/A concise, memorable statement that expresses a general truth or principle; a pithy maxim or aphorism.
apophyge
nounRare
/əˈpɒfɪdʒiː/The curved joining (usually a concave curve) at the top and bottom of a classical column, where the shaft meets the capital or base.
apophyllite
nounVery Low
/əˈpɒfɪlʌɪt/A mineral of the phyllosilicate group, typically forming transparent or white crystals.
apophysis
nounVery Low Frequency / Technical
/əˈpɒfɪsɪs/A natural swelling, projection, or outgrowth from a bone or other structure.
apoplast
nounVery rare / Technical
/ˈæp.ə.plɑːst/The non-living space surrounding plant cells, including cell walls and intercellular spaces, through which water and solutes can move.
apoplectic
adjectivenounC1
/ˌæp.əˈplek.tɪk/Suffering from or showing extreme anger; enraged.
apoplexy
nounC2
/ˈæp.ə.plek.si/A sudden and often severe loss of consciousness, sensation, and voluntary movement caused by the rupture or blockage of a blood vessel in the brain; a stroke.
apoprotein
nounVery Low
/ˌæpəʊˈprəʊtiːn/The protein component of a conjugated protein, without its non-protein prosthetic group.
apoptosis
nounC2
/ˌæpəpˈtəʊsɪs/The process of programmed cell death, a normal and controlled part of an organism's growth and development.

Showing 5901–5920 of 8734 words.