shark -
any of numerous elongate mostly marine carnivorous fishes with heterocercal caudal fins and tough skin covered with small toothlike scales
elasmobranch,
selachian any of numerous fishes of the class Chondrichthyes characterized by a cartilaginous skeleton and placoid scales: sharks; rays; skates
ginglymostoma cirratum,
nurse shark small bottom-dwelling shark of warm shallow waters on both coasts of North America and South America and from southeast Asia to Australia
hammerhead shark,
hammerhead medium-sized live-bearing shark with eyes at either end of a flattened hammer-shaped head; worldwide in warm waters; can be dangerous
shark -
a person who is ruthless and greedy and dishonest
SHARK is a block cipher identified as one of the predecessors of Rijndael. SHARK has a 64-bit block size and a 128-bit key size. It is a six round SP-network which alternates a key mixing stage with linear and non-linear transformation layers.
OmegaWiki Dictionary
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shark A scaleless fish with a cartilaginous skeleton that has 5 to 7 gill slits on each side of its head.