[pronunciation spelling of CT, "contraterrene"] Obs. contraterrene. Sometimes as n. Compare terrene.
- 1943 W. Stewart Opposites — React! Astounding S-F (Jan.) № 10/2: He knew that seetee was a key to illimitable power, both physical and political. Because a pebble of it, in contact with any normal matter, reacted with the energy of a ton of detonating tritonite.
- 1943 A.E. van Vogt Storm B. W. Aldiss Space Opera (1974) № 211: The stripped seetee nuclei carried now terrific and unbalanced negative charges and repelled electrons, but tended to attract terrene atom nuclei.
- 1954 G. O. Smith Spacemen Lost Startling Stories (Fall) № 38/1: "They may be contraterrene." "Seetee?"
- 1955 G. Gunther Startling Stories (letter) (Spring) № 8/1: Both parties, the terrene as well as the contra[-]terrene, entertain exactly the same viewpoint of the Universe. But this sameness cannot be communicated across the gulf that separates our form of physical reality from the one of the seetee world.
