[1] : The Collaborative International Dictionary of English v.0.48

seal \seal\ s=el, n. oe. sele, as. seolh; akin to ohg.
   selah, dan. sael, sw. sjauml, icel. selr. zool.
   any aquatic carnivorous mammal of the families phocidae and
   otariidae.
   1913 webster

   note: seals inhabit seacoasts, and are found principally in
         the higher latitudes of both hemispheres. there are
         numerous species, bearing such popular names as sea
         lion, sea leopard, sea bear, or ursine seal,
         fur seal, and sea elephant. the bearded seal
         erignathus barbatus, the hooded seal cystophora
         cristata, and the ringed seal phoca foetida, are
         northern species. see also eared seal, harp seal,
         monk seal, and fur seal, under eared, harp,
         monk, and fur. seals are much hunted for their
         skins and fur, and also for their oil, which in some
         species is very abundant.
         1913 webster

   harbor seal zool., the common seal phoca vitulina. it
      inhabits both the north atlantic and the north pacific
      ocean, and often ascends rivers; -- called also marbled
      seal, native seal, river seal, bay seal, land
      seal, sea calf, sea cat, sea dog, dotard,
      ranger, selchie, tangfish.
      1913 webster
see also:
phocidae otariidae sea lion sea leopard sea bear ursine seal 
fur seal sea elephant erignathus barbatus cystophora cristata phoca foetida 
eared seal harp seal monk seal fur seal eared 
harp monk fur harbor seal phoca vitulina 
marbled seal native seal river seal bay seal land seal 
sea calf sea cat sea dog dotard ranger 
selchie tangfish 

[2] : The Collaborative International Dictionary of English v.0.48

sea lion \sea" li"on\ zool.
   any one of several large species of seals of the family
   otariidae native of the pacific ocean, especially the
   southern sea lion otaria jubata of the south american
   coast; the northern sea lion eumetopias stelleri found
   from california to japan; and the black, or california, sea
   lion zalophus californianus, which is common on the rocks
   near san francisco.
   1913 webster
see also:
otariidae otaria jubata eumetopias stelleri zalophus californianus 

[3] : WordNet (r) 2.0

sea lion
     n : any of several large eared seals of the northern pacific
         related to fur seals but lacking their valuable coat

Black Sea >> B Words
Black Sea, definition of term: Black Sea
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Caribbean Sea >> C Words
Caribbean Sea, definition of term: Caribbean Sea
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Caspian Sea >> C Words
Caspian Sea, definition of term: Caspian Sea
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Coral Sea >> C Words
Coral Sea, definition of term: Coral Sea
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Baltic Sea >> B Words
Baltic Sea, definition of term: Baltic Sea
baltic+sea_pag1.html

At Sea >> A Words
At Sea, definition of term: At Sea
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Aegean Sea >> A Words
Aegean Sea, definition of term: Aegean Sea
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American Lion >> A Words
American Lion, definition of term: American Lion
american+lion_pag1.html

Ant Lion >> A Words
Ant Lion, definition of term: Ant Lion
ant+lion_pag1.html

Adriatic Sea >> A Words
Adriatic Sea, definition of term: Adriatic Sea
adriatic+sea_pag1.html