parabolic orbit
McGraw-Hill Science & Technology Dictionary:
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parabolic orbit
(¦par·ə¦bäl·ik ′ör·bət)
(astronomy) An orbit whose overall shape is like a parabola; the orbit represents the least eccentricity for escape from an attracting body.
Wiley Book of Astronomy:
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parabolic orbit
An open (escape) orbit with an eccentricity of 1. Parabolic velocity is the minimum velocity needed to escape from a given closed orbit.
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