1. Relating to or characteristic of an apogee
   "apogean tides occur when the moon is at the apogee of its orbit"

See also: apogee

• systema alimentarium
• systema digestorium
• systema lymphaticum
• systema nervosum
• systema nervosum centrale
• systema nervosum periphericum
• systema respiratorium
• systema skeletale
• systema urogenitale
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• systemic circulation