bollard(n = noun.artifact) bitt - a strong post (as on a wharf or quay or ship for attaching mooring lines); "the road was closed to vehicular traffic with bollards"
is a kind of post
is a part of dock, pier, wharf, wharfage
has parts: bitthead
has particulars: riding bitt
An upright wooden or iron post in a boat or on a dock, used in veering or fastening ropes. [1913 Webster]
bollard, n.
1 Brit. a short metal, concrete, or plastic post in the road, esp. as part of a traffic island.
2 a short post on a quay or ship for securing a rope.
Etymology:
ME perh. f. ON bolr BOLE(1) + -ARD