Words in english starting with A

• attention deficit hyperactivity disorder — Noun – English ～ a condition (mostly in boys) characterized by behavioral and learning disorders
• auditory hyperesthesia — Noun – English ～ abnormal acuteness of hearing due to increased irritability of the sensory neural mechanism; characterized by intolerance for ordinary sound levels
• Amaranthus hybridus hypochondriacus — Noun – English ～ tall showy tropical American annual having hairy stems and long spikes of usually red flowers above leaves deeply flushed with purple; seeds often used as cereal
• Amaranthus hypochondriacus — Noun – English ～ leaves sometimes used as potherbs; seeds used as cereal; southern United States to Central America; India and China
• Arachis hypogaea — Noun – English ～ widely cultivated American plant cultivated in tropical and warm regions; showy yellow flowers on stalks that bend over to the soil so that seed pods ripen underground
• Actitis hypoleucos — Noun – English ～ a variety of sandpiper
• Avogadro's hypothesis — Noun – English ～ the principle that equal volumes of all gases (given the same temperature and pressure) contain equal numbers of molecules
• anemic hypoxia — Noun – English ～ hypoxia resulting from a decreased concentration of hemoglobin
• anise hyssop — Noun – English ～ much-branched North American herb with an odor like fennel
• anxiety hysteria — Noun – English ～ a form of hysteria having features of both conversion disorder and anxiety neurosis
• Alexander I — Noun – English ～ the czar of Russia whose plans to liberalize the government of Russia were unrealized because of the wars with Napoleon (1777-1825)
• Antonio Gaudi i Cornet — Noun – English ～ Spanish architect who was a leading exponent of art nouveau in Europe (1852-1926)
• angiotensin I — Noun – English ～ a physiologically inactive form of angiotensin that is the precursor to angiotensin II
• Artaxerxes I — Noun – English ～ king of Persia who sanctioned the practice of Judaism in Jerusalem (?-424 BC)
• Al-Hasan ibn al-Haytham — Noun – English ～ an Egyptian polymath (born in Iraq) whose research in geometry and optics was influential into the 17th century; established experiments as the norm of proof in physics (died in 1040)
• Alexander II — Noun – English ～ the son of Nicholas I who, as czar of Russia, introduced reforms that included limited emancipation of the serfs (1818-1881)
• angiotensin II — Noun – English ～ a potent vasopressor agent formed from angiotensin I
• Artaxerxes II — Noun – English ～ king of Persia who subdued numerous revolutions and made peace with Sparta (?-359 BC)
• Alexander III — Noun – English ～ son of Alexander II who was czar of Russia (1845-1894)
• Anacin III — Noun – English ～ an analgesic for mild pain but not for inflammation; also used as an antipyretic; (Datril, Tylenol, Panadol, Phenaphen, Tempra, and Anacin III are trademarks of brands of acetaminophen tablets)

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