| AST | the branch of physics that studies celestial bodies and the universe as a whole |
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| AST | a satellite equipped with a telescope to observe infra-red radiation |
| AST | a linear unit used for astronomical distances |
| AST | of or concerned with astrophysics |
| AST | an astronomer who studies the physical properties of celestial bodies |
| AST | the branch of astronomy concerned with the physical and chemical properties of celestial bodies |
| AST | includes many of the basket stars |
| AST | a variety of basket star |
| AST | a genus of fish of the family Apogonidae |
| AST | found in West Indies |
| AST | marked by practical hardheaded intelligence |
| AST | in a shrewd manner |