| ASTRO | the branch of biology concerned with the effects of outer space on living organisms and the search for extraterrestrial life |
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| ASTRO | comparatively large neuroglial cell |
| ASTRO | (neurology) of or relating to or containing large star-shaped cells in the neuroglia |
| ASTRO | a transparent dome on top of an airplane where the navigator can make celestial observations |
| ASTRO | the branch of astronomy that studies the motion of natural and artificial bodies in space |
| ASTRO | navigate in space |
| ASTRO | guide in interplanetary travel |
| ASTRO | the navigator of a spacecraft |
| ASTRO | tissue consisting of large stellate neuroglial cells |
| ASTRO | an early form of sextant |
| ASTRO | worship of planets or stars |
| ASTRO | someone who predicts the future by the positions of the planets and sun and moon |