It seems post-velar usually refers to a uvular place of articulation. In the wiki of the Americanist phonetic notation, they are listed as synonyms.
But sometimes the term seems to mean 'everything articulated farther back than velars', so it could cover uvular, pharyngeal, and glottal. Is it commonly used as such a cover term?
Is one of these two uses established practice? Or is the term really used both ways?