An Etymological Dictionary of Astronomy and Astrophysics

The phenomenon experienced by a body when there is no force of reaction on it. This happens when the body is in → free fall in a → gravitational field or when the net force on it is zero.

Etymology (EN): From → weight + -less suffix meaning “without”

• -ness a suffix of quality or state.

Etymology (PE): Bivazni, from bi- “without,” → a-,

• vazn, → weight, + -i.