- Sextans (Wikipedia)
Sextans is a minor equatorial constellation which was introduced in 1687 by Johannes Hevelius. Its name is Latin for the astronomical sextant, an instrument that Hevelius made frequent use of in his observations.
- Psychoactive drug (Wikipedia)
A psychoactive drug, psychopharmaceutical, psychoactive agent or psychotropic drug is a chemical substance that changes functions of the nervous system, and results in alterations in perception, mood, cognition, and behavior.