Noun

• S: (n) pearl (a smooth lustrous round structure inside the shell of a clam or oyster; much valued as a jewel)
• S: (n) bone, ivory, pearl, off-white (a shade of white the color of bleached bones)
• S: (n) drop, bead, pearl (a shape that is spherical and small) "he studied the shapes of low-viscosity drops"; "beads of sweat on his forehead"

Verb

• S: (v) pearl (gather pearls, from oysters in the ocean)