"fluke" in the noun sense
1. good luck, fluke, good fortune
a stroke of luck
a barb on a harpoon or arrow
3. fluke, flue
flat bladelike projection on the arm of an anchor
either of the two lobes of the tail of a cetacean
5. fluke, trematode, trematode worm
parasitic flatworms having external suckers for attaching to a host
Source: WordNet® (An amazing lexical database of English)
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