(idiomatic) To give things of value to those who will not understand or appreciate them.

Third-person singular simple present indicative form of cast pearls before swine

An endangered species of freshwater mussel, Margaritifera margaritifera, capable of producing quality pearls.

plural of pearl-bordered fritillary

A medium size, orange and brown butterfly with pearl markings on the under wing, Boloria euphrosyne, of the family Nymphalidae.

plural of freshwater pearl mussel

One of 82 counties in Mississippi, United States. County seat: Poplarville.

(chiefly US, dated) Good gracious; good heavens.

(mineralogy) perlite

plural of pearlstone