Word.ws English Dictionary

space equivalent zone

space equivalent zone noun: the top of the Earth's atmosphere, from 50,000 ft (the start of the stratosphere) and up (to the edge of the exosphere at 1000 mi); where the effects of exposure to the environment on human life is similar to that of exposure to space; it being physiologically incompatible with human life.

Noun

space equivalent zone (uncountable)

  1. The top of the Earth's atmosphere, from 50,000 ft (the start of the stratosphere) and up (to the edge of the exosphere at 1000 mi); where the effects of exposure to the environment on human life is similar to that of exposure to space; it being physiologically incompatible with human life.

Questions about space equivalent zone

What does space equivalent zone mean?
Space equivalent zone means the top of the Earth's atmosphere, from 50,000 ft (the start of the stratosphere) and up (to the edge of the exosphere at 1000 mi); where the effects of exposure to the environment on human life is similar to that of exposure to space; it being physiologically incompatible with human life.
What part of speech is space equivalent zone?
Space equivalent zone is a noun.

Words near space equivalent zone in the dictionary

  1. space dyeing
  2. space elevator
  3. space elevators
  4. space environment
  5. space environments
  6. space equivalent zone
  7. space exploration
  8. space explorations
  9. space factor
  10. space factors
  11. space fixed reference

Source and license

Adapted from Wiktionary: space equivalent zone (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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