translumic en · ADJ
Etymology
From trans- + lumic.
Meanings
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(not-comparable, rare) Near the speed of light; having a speed near that of light.
Ranald Porteous, chief test pilot of Auster Aircraft, Ltd. […] in his company’s house journal[:] “[…] A further difficulty, due to the Soviet veto on discussions dealing with the Interplanetary Date Line, is that pilots carrying out tests at translumic speeds have often found themselves back at their base before they have started.”
1949 November 10, “Here and There. Lighter than Fast”, in Flight, volume 56, number 2133, page 607b:A thought provoking book, even if it seems a little premature to trouble about translumic speeds and the need to avoid collisions with self-illuminating stars and dark objects in stellar space.
1965, Aircraft, volume 45, page 72:The avoidance of collisions by manned vehicles moving at these 'translumic' speeds presents a formidable problem.
1965, William F. Hilton, Manned Satellites, Their Achievements and Potentialities, page 131: