| astronomy |
the branch of science concerned with the physical universe beyond the atmosphere of the earth. |
| astrophotography |
the photographing of astronomical objects. |
| astrophysics |
(used with a sing. verb) the branch of physics that deals with the physical and chemical properties of heavenly bodies and interstellar space. |
| astute |
keen in understanding and judgment; shrewd. |
| Asunción |
the capital of Paraguay. |
| asunder |
in or into separate parts or pieces. [2 definitions] |
| as usual |
in the usual way; as always. |
| as well |
in addition; also; too. |
| as well as |
and also; and moreover. [2 definitions] |
| as yet |
up until now; up to this point. |
| asylum |
(old-fashioned) an institution for the care of those who are unable to maintain themselves, such as orphans or the severely mentally ill. [3 definitions] |
| asymmetric |
different, esp. in arrangement of space, on either side of a center line; not symmetrical; unbalanced. |
| asymmetry |
the state or quality of having two unidentical halves; lack of balance. |
| asymptomatic |
not showing any symptoms of a disease (usu. used in reference to an individual who does, in fact, have the disease and may or may not be a carrier). |
| asymptote |
in mathematics, a straight line that approaches but never meets a curve. |
| asynchronous |
not occurring at the same time. [2 definitions] |
| At |
symbol of the chemical element astatine. |
| at1 |
on or in the location of. [5 definitions] |
| at2 |
the smaller monetary unit of Laos. (Cf. kip.) |
| at- |
to. |
| Atacama |
a desert in northern Chile that lies between the Pacific Ocean and the Andes mountains. |