different between superluminal vs tesseract

English

Etymology

super- +? luminal

Adjective

superluminal (comparative more superluminal, superlative most superluminal)

1. (astronomy, physics, fiction, fantasy) Faster than light; having a speed greater than light.
   • 1984, Edward Edelson, "Faster than light?," Popular Science, p. 70 (retrieved 20 Nov 2013):

     The first thing to understand about superluminal expansion is that it isn't visible to the unaided eye. The objects that appear to be moving faster than light are emitting radio waves, not visible light.

Synonyms

• FTL, superlumic, hyperlight
• supercausal (faster than the speed of causality)

Antonyms

• STL, subluminal, sublumic, sublight

Derived terms

Related terms

• luminal
• subluminal

Translations

See also

• superluminous
• supersonic

Further reading

• faster-than-light on Wikipedia.Wikipedia

English

Etymology

From tessara- (“four-”) +? Ancient Greek ????? (aktís, “ray”).

Noun

tesseract (plural tesseracts)

1. (mathematics) The four-dimensional analogue of a cube; a 4D polytope bounded by eight cubes (in the same way a cube is bounded by six squares).
2. (science fiction) Any of various fictional mechanisms that explain extradimensional, superluminal, or time travel outside the geometry of the physical universe.

Synonyms

• (analogue of a cube): four-dimensional hypercube, 4-cube, 8-cell, octachoron, tetracube

Hypernyms

• hypercube, polytope

Derived terms

• tesseractic

Translations

See also

• tesseract on Wikipedia.Wikipedia
• Mathworld article on the tesseract

Anagrams

• rascettes