1. Of, relating to, emanating from, or resembling the stars.
2. Biology Of, relating to, or shaped like the mitotic aster; star-shaped.
3. Of or relating to a supersensible body believed by theosophists to coexist with and survive the death of the human physical body: an astral body; astral projection.
[Late Latin astrālis, from Latin astrum, star, from Greek astron; see ster-3 in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.