atmosphericsRadio interference caused by pulses of electromagnetic radiation in the atmosphere as the result of lightning and other events (both natural and man-made)
atoleA sweetened thick drink or thin gruel made from cornmeal, served hot.
atollA type of island consisting of a ribbon reef that nearly or entirely surrounds a lagoon and supports, in most cases, one to many islets on the reef platform.
atoltivimabA monoclonal antibody used in the combination drug atoltivimab/maftivimab/odesivimab to treat Zaire ebolavirus.
atomThe smallest possible amount of matter which still retains its identity as a chemical element, now known to consist of a nucleus surrounded by electrons.
atomaniacA fanatical advocate for the nuclear arms race.
atomateHaving a surface covered in tiny shiny particles; powdered.
atomitatA luxury underground bunker; an underground house designed for habitation during a nuclear fallout or other catastrophic event; a luxurious (and often large, homely) fallout shelter.
AtomiumA landmark modernist building in Brussels, Belgium.
atopognosiaThe inability to locate a sensation, especially a point of touch.
atoposauridAny of the extinct reptiles in the family Atoposauridae.
atopyA hereditary disorder marked by the tendency to develop localized immediate hypersensitivity reactions to allergens such as pollen, food etc and is manifested by hay fever, asthma, or similar allergic conditions; generally considered to be caused by the interaction of environmental and genetic factors.
AtoradaA moribund Arawakan language of Brazil and Guyana.
atpThe Agreement on the International Carriage of Perishable Foodstuffs and on the Special Equipment to be used for such Carriage (ATP).
ATPaseA type of enzyme which works to convert adenosine triphosphate (ATP) into adenosine diphosphate (ADP) and a free phosphate ion, thereby releasing energy to be used in cellular activity.
atpEA gene that encodes for ATP synthase c subunit in mycobacteria.
ATPergicProduced or activated by ATP (adenosine triphosphate).
atrabilarianCharacterized by melancholy or glum; atrabilarious; atrabilious.
atractylonThe benzofuran (4aS,8aR)-3,8a-dimethyl-5-methylidene-4,4a,6,7,8,9-hexahydrobenzo[f][1]benzofuran present in rhizomes of Atractylodes
atractylosideA toxic glycoside synthesized by some plant species in the daisy family.
atracuriumA muscle relaxant administered intravenously in the form of its besylate C₆₅H₈₂N₂O₁₈S₂ especially in conjunction with general anesthesia to facilitate insertion of an endotracheal tube or to relax skeletal muscles during surgery or mechanical ventilation. It counteracts the action of the neurotransmitter acetylcholine at neuromuscular junctions by binding to the same receptors it acts upon.