Alternative term: Multi-leg mooring
A mooring in which lines are taken to a number of points (anchors or sinkers) at the sea bed.
Other related self-explanatory terms are single-point or single-leg mooring, three-point or three-leg mooring, etc...
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM