An Etymological Dictionary of Astronomy and Astrophysics

1. Logic: Relating to or involving inductive reasoning from particular facts or effects to a general principle (dictionary.com).
   

2. Logic: Derived from or requiring evidence for its validation or support; empirical; open to revision (dictionary.com). → a priori.

Etymology (EN): L., literally “from what comes after,” from posterior “after, later, behind,” comparative of posterus “coming after, subsequent,” from post “after,” → post-.

Etymology (PE): Afdom “the last,” Dehxodâ: afdom “last, end;” Mid.Pers. abdom, apdom; from Proto-Ir. *apatama- superlative of *apa- “away from, from;” cf. Av. apəma- “the last, the most distant;” Skt. apamá-.