Quick definitions from WordNet (pearl)

▸ noun:  a smooth lustrous round structure inside the shell of a clam or oyster; much valued as a jewel
▸ noun:  a shade of white the color of bleached bones
▸ noun:  a shape that is small and round
▸ verb:  gather pearls, from oysters in the ocean
▸ name:  A female given name (common: 1 in 1063 females; popularity rank in the U.S.: #224)
▸ name:  A surname (rare: 1 in 50000 families; popularity rank in the U.S.: #4846)

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▸ Also see pearl