In 1600, dr. william gilbert coined the term “electrica,” a word that gave rise to our word electricity.
what does this term “electrica” describe?

They recorded the first references to electrical effects, such as static electricity and lightning, over 2,500 years ago. It was not until 1600 that a man named Dr. William Gilbert coined the term “electrica,” a Latin word which describes the static charge that develops when certain materials are rubbed against amber.

vapour or gas assuming atmospheriv pressure