An archaic or variant spelling of alabaster, a smooth white or translucent stone used for carving ornamental objects and vessels.
From Greek alabastron, with Old English and Middle English spelling variations. The spelling 'alablaster' shows how medieval scribes sometimes added the 'al-' prefix (from Arabic article 'al-') to the already-prefixed alabaster.
This weird spelling reveals that 'al-' in alabaster is actually the Arabic article 'the' that got stuck to the beginning—so it literally means 'the alabastron,' and medieval English speakers added it again by accident!
Complete word intelligence in one call. Free tier — 50 lookups/day.