fluke

nouns

a stroke of luck
fluke, good fortune, good luck
is derived from
fluky
is derived from
flukey
a barb on a harpoon or arrow
fluke
is a part of
a spear with a shaft and barbed point for throwing; used for catching large fish or whales; a strong line is attached to it
harpoon
is a type of (narrower)
a subsidiary point facing opposite from the main point that makes an arrowhead or spear hard to remove
barb
flat bladelike projection on the arm of an anchor
flue, fluke
either of the two lobes of the tail of a cetacean
fluke
is a part of
large aquatic carnivorous mammal with fin-like forelimbs no hind limbs, including: whales; dolphins; porpoises; narwhals
blower, cetacean, cetacean mammal
is a type of (narrower)
the posterior part of the body of a vertebrate especially when elongated and extending beyond the trunk or main part of the body
tail
parasitic flatworms having external suckers for attaching to a host
fluke, trematode, trematode worm