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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)

apical dominance
nounRare
/ˈeɪ.pɪ.kəl ˈdɒm.ɪ.nəns/The inhibitory effect of a plant's terminal bud (apex) on the growth of lateral buds below it.
apical meristem
nounC1/C2 (Technical)
/ˈeɪ.pɪ.kəl ˈmɛ.rɪ.stem/The region of actively dividing cells at the tips of plant shoots and roots, responsible for primary growth and elongation.
apices
nounC2
/ˈeɪ.pɪ.siːz/The plural form of 'apex', meaning the highest points, peaks, or tips of something.
apicoalveolar
adjectivenounC1-C2 / Extremely Low (Very specialized technical term)
/ˌeɪpɪkəʊælˈviːələ/A consonant sound produced with the tip (apex) of the tongue touching or near the alveolar ridge (the bony ridge behind the upper front teeth).
apicodental
adjectivenounVery Low
/ˌeɪpɪkəʊˈdɛnt(ə)l/Of a speech sound (especially a consonant), articulated with the tip of the tongue against the upper front teeth.
apicoectomy
nounVery Low
/ˌæpɪkəʊˈɛktəmi/A surgical procedure to remove the tip (apex) of a tooth's root, typically to treat persistent infection or abscess after failed root canal treatment.
apiculture
nounC2
/ˈeɪpɪkʌltʃə/The activity or practice of keeping bees, especially on a large scale, to collect their honey and other products.
apiculus
nounSpecialist/Rare
/əˈpɪkjʊləs/A short, sharp point or projection at the tip of a leaf, pollen grain, or certain other biological structures.
apiology
nounVery Low
/ˌeɪpɪˈɒlədʒi/The scientific study of bees, particularly honey bees.
apis
nounLow (C2 level vocabulary)
/ˈeɪ.pɪs/The genus name for the honey bee.
aplacophoran
nounC1
/ˌap.ləˈkɒ.fə.rən/A member of a class of small, deep-sea molluscs (Aplacophora) lacking a shell.
aplanogamete
nounC2 - Very Low Frequency / Specialized
/ˌeɪplænəʊˈɡæmiːt/A non-motile gamete; a reproductive cell (e.g., an egg or sperm cell) that lacks the ability to move independently.
aplanospore
nounVery Low
/əˈplænə(ʊ)spɔː/A non-motile spore produced by some algae and fungi, incapable of independent movement.
aplasia
nounC2
/əˈpleɪ.zi.ə/The failure of a tissue or organ to develop normally, resulting in its complete or partial absence.
aplastic anemia
nounRare
/eɪˌplæs.tɪk əˈniː.mi.ə/A medical condition where the bone marrow fails to produce sufficient new blood cells.
aplite
nounVery low
/ˈæplaɪt/A fine-grained, light-colored igneous rock composed mainly of quartz and feldspar.
aplomb
nounC1/C2
/əˈplɒm/Complete self-confidence and poise, especially in a challenging situation.
apnea
nounC1
/æpˈniː.ə/A temporary cessation of breathing, especially during sleep.
apneusis
nounVery Low / Technical
/əpˈnjuːsɪs/A pathological breathing pattern characterized by a prolonged, gasping inspiration followed by a short, inadequate expiration.
apnoea
nounLow
/æpˈniː.ə/A temporary cessation of breathing, especially during sleep.

Showing 5841–5860 of 8734 words.