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Comprehensive
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atonement the act of atoning; reparation. [3 definitions]
at one's elbow close by.
at one's fingertips readily available.
at one's heels in close pursuit.
at one's leisure when the time is convenient; when one has spare time.
atop at or on the highest point. [2 definitions]
atopic of or relating to a genetic tendency to develop allergic reactions.
atopy a genetic tendency to develop allergic reactions that is typically associated with a heightened immune response to certain allergens.
-ator one that does (such) a thing or acts in (such) a way.
atorvastatin a drug that lowers lipid levels in blood.
-atory of or pertaining to. [3 definitions]
a tough nut to crack a problem or situation that is difficult to solve or cope with. [2 definitions]
ATP a biochemical compound that serves to store energy in all living cells; adenosine triphosphate. (Cf. ADP.)
at present right now.
atrabilious sad, gloomy, or melancholy. [2 definitions]
atresia the abnormal absence or closure of an orifice or passage within the body. [2 definitions]
at rest inactive, not moving, or in repose. [2 definitions]
Atreus in Greek mythology, king of Mycenae and father of Agamemnon and Menelaus.
a trifle a little bit; somewhat; slightly.
atrioventricular of, involving, or located between the atria and ventricles of the heart.
atrium an enclosed courtyard, esp. in ancient Roman houses or early Christian churches. [2 definitions]