armomancyDivination using the shoulder blade of an animal. It was taken from a dead animal and thrown into a fire, and the cracks formed in the bone were then interpreted.
arrosionThe wasting away of a vessel wall under pressure.
ArsacesThe dynastic name of several Parthian and Armenian kings of the Arsacid dynasty.
ArsacidOf or pertaining to the Parthian dynasty established by Arsaces I which ruled the Parthian Empire during 247 BC – 224 AD, Armenia during 54–428, as well as Iberia and Caucasian Albania
ArsamosataAn ancient city situated on the bank of the Murat River (called the Arsanias in classical sources), near the present-day city of Elazığ in Turkey.
ars antiquaThe medieval music of Europe during the High Middle Ages, between approximately 1170 and 1310.
ars novaA musical style that flourished in the Kingdom of France and its surroundings during the Late Middle Ages, particularly between the preparation of the Roman de Fauvel (1310s) and the death of composer Guillaume de Machaut in 1377.
Ashby MagnaA village and civil parish in Harborough district, Leicestershire, England (OS grid ref SP5690).
Asia MinorA large peninsula, mostly coterminous with Anatolia, between the Mediterranean Sea, the Aegean Sea and the Black Sea; it makes up the Asian part of Turkey.
asiarchOne of the chiefs or pontiffs of the Roman province of Asia, who had the superintendence of the public games and religious rites.
asinarySynonym of asinine (“ass-like, donkey-like, in sutbbornness, foolishness, or other ways”).
assessionA sitting beside or near; especially as a participant in an official proceeding such as a meeting of an organization or a court case; an official membership or seat.
asseverateTo assert earnestly, seriously, and confidently
asseverationAn earnest affirmation; a declaration of support.
assibilateTo change into or pronounce with the accompaniment of a sibilant sound or sounds.
assidentOf a symptom, generally, but not always, accompanying a disease; indicative of the presence of a disease but not a necessary occurrence in conjunction with that disease.