Inside the Universes

[good_luck.n.02] as in: a stroke of luck

[fluke.n.02] as in: a barb on a harpoon or arrow

[fluke.n.03] as in: flat bladelike projection on the arm of an anchor

[fluke.n.04] as in: either of the two lobes of the tail of a cetacean

[fluke.n.05] as in: parasitic flatworms having external suckers for attaching to a host