pinniped adjective & noun. 
['pɪnɪpɛd] Also pinnipede 
[-pi:d]. 
M19.[from mod. Latin Pinnipedia noun pl., from Latin pinna fin, wing + ped-, pes foot (cf. Latin pinnipes wing-footed).]Zoology.
A. adjective. Having feet resembling fins. Now 
spec. designating or pertaining to a mammalian pinniped (see sense B. below). 
M19.b. noun. A pinniped animal; 
spec. any of a group of mammals of the order Carnivora which have the digits fused to form flippers adapted for swimming (i.e. seals, sea lions, and walruses). Cf. 
FISSIPED. 
M19.  [TahlilGaran] English Dictionary ▲