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This ROOT-WORD is STEREO which means SOLID. It comes from the Greek stereo which means a solid body. Years ago the Root STEREO was mainly associated with a STEREOpticon which is an optical instrument for throwing pictures on a screen. Today, with the advent of motion pictures and the STEREOscope, and its use with a phonograph, illustrated lectures are given in the classroom with great profit to the student.

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12y ago

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