Vladimir Borisovich Rojansky (April 9, 1900 – March 6, 1981) was an American physicist, author and educator.

At the outbreak of the Russian Civil War (August 8, 1918) he enlisted in the dragoons of the White Army.

From 1955 to 1965 he worked in the aerospace industry, first at the Ramo-Wooldridge Corporation and later at the Space Technology Laboratories of TRW.

[1] In a 1935 paper,[2] Rojansky coined the terms "terrene" and "contraterrene" to describe, respectively, ordinary matter and the substance now commonly known as "antimatter," in which "atoms consist of negative nuclei surrounded by positrons."

[3] This suggestion was embraced by some meteorite specialists, and also found its way into science fiction stories.