- good luck, fluke, good fortune - a stroke of luck
--1 is a kind of luck, fortune
--1 has particulars: serendipity - fluke - a barb on a harpoon or arrow
--2 is a kind of barb
--2 is a part of harpoon- fluke, flue - flat blade-like projection on the arm of an anchor
--3 is a kind of projection
--3 is a part of anchor, ground tackle- fluke - either of the two lobes of the tail of a cetacean
--4 is a kind of tail
--4 is a part of cetacean, cetacean mammal, blower- fluke, trematode, trematode worm - parasitic flatworms having external suckers for attaching to a host
--5 is a kind of flatworm, platyhelminth
--5 is a member of Trematoda, class Trematoda
--5 has particulars:liver fluke, Fasciola hepatica; Fasciolopsis buski; schistosome, blood fluke - fluke, flue - flat blade-like projection on the arm of an anchor