jib
noun [ C ] specialized uk/dʒɪb/ us/dʒɪb/
(BOAT)
sailing 艏三角帆，主帆前的小帆
a small sail in the shape of a triangle, positioned in front of the main sail on a boat
(LIFTING TOOL)
engineering （起重机的）悬臂，挺杆
a long horizontal frame that sticks out from a crane and from which the hook hangs