Bible Dictionaries
Periastron

Webster's Dictionary

(n.) That point, in the real or apparent orbit of one star revolving around another, at which the former is nearest to the latter.

Bibliography Information
Webster, Noah. Entry for 'Periastron'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​p/periastron.html. 1828.