apsid Definition
either of the two points on the orbit of a planet or other celestial body that are nearest to or farthest from the body being orbited.
Using apsid: Examples
Take a moment to familiarize yourself with how "apsid" can be used in various situations through the following examples!
Example
The apsides of Earth's orbit are the perihelion and aphelion.
Example
The apsides of Mars' orbit are the periareion and apoareion.
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Summary: apsid in Brief
An 'apsid' [ˈæpsɪd] refers to either of the two points on the orbit of a planet or other celestial body that are nearest to or farthest from the body being orbited. For example, the apsides of Earth's orbit are the perihelion and aphelion.
