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apterous
aptitude
aptitude test
Apus
APWU
APY
apyrase
apyrexia
aq
aq.
AQ rate
Aqaba, Gulf of
Aqmola
aqua
aqua-
Aqua-Lung
aqua regia
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apse

apse [ aps ] (plural apses)


noun 
Definition:
 
1. rounded projection on building: a semicircular projecting part of a building, especially the east end of a church, which contains the altar

2. astronomy 
Same as  apsis (sense 1)


[Early 19th century. < Latin apsis (see apsis)]
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