An archaic or technical term meaning tending to fall or collapse together; lacking support or stability.
From Latin 'collabens,' the present participle of 'collabi' meaning 'to fall together,' composed of 'com-' (together) and 'labi' (to fall or slide).
This rare Latin-rooted word survives mainly in geological and architectural texts to describe unstable structures—it's a linguistic fossil from when English borrowed more freely from scientific Latin.
Complete word intelligence in one call. Free tier — 50 lookups/day.