Made from or looking like mother-of-pearl; iridescent or pearly.

A pale grey colour, tinted with blue, like that of some pearls.

Of a pale grey colour, tinted with blue, like that of some pearls.

A person who dives for pearls. / (slang) A person who works as a dishwasher.

A deep water harbor on Oahu, Hawaii. / A US Navy base at the harbor. / The attack on Pearl Harbor.

A sneak attack, often using underhanded measures. / A seminal dramatic event that unites a community and arouses it into action against an enemy.

(often passive, slang) To attack by surprise; to subject to a sneak attack. / (often passive, slang, rare) To take rudely by surprise.

Alternative spelling of sulphur pearl

a very large, but harmless, bacterium, Thiomargarita namibiensis, that grows as a string of white beads large enough to be visible to the naked eye in the coastal sediments of Namibia

The pearl oyster.