Definition: a smooth lustrous round structure inside the shell of a clam or oyster; much valued as a jewel
Definition: a shape that is spherical and small; "he studied the shapes of low-viscosity drops"; "beads of sweat on his forehead"
Definition: A shelly concretion, usually rounded, and having a brilliant luster, with varying tints, found in the mantle, or between the mantle and shell, of certain bivalve mollusks, especially in the pearl oysters and river mussels, and sometimes in certain univalves. It is usually due to a secretion of shelly substance around some irritating foreign particle. Its substance is the same as nacre, or mother-of-pearl. Round lustrous pearls are used in jewellery.
Definition: gather pearls, from oysters in the ocean
Definition: To set or adorn with pearls, or with mother-of-pearl.