interastral en · ADJ
Etymology
From inter- + astral.
Meanings
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(archaic, not-comparable) interstellar
Let us suppose that gravitation affects all matter, and that the rare matter of space is more condensed around the spheres than in interastral space.
1881, James Samuelson, Sir William Crookes, The Journal of Science, and Annals of Astronomy, Biology, Geology, Industrial Arts, Manufactures, and Technology, volume 18, page 643: