Nacre. Mother of Pearl . A biomineral consisting of layers of crystalized ARAGONITE, separated by interlamellar layers of organic matrix containing beta-CHITIN, and surrounded by an intercrystalline organic membrane of silk fibroin. Nacre is the iridescent substance better known as mother-of-pearl that is secreted by MOLLUSCS. . 1.00
Pinctada. Pearl Oyster . Oyster, Pearl . Pearl Oysters . Pinctadas . Oysters, Pearl . A genus of pearl oysters in the family Pteriidae, class BIVALVIA. Both cultured and natural pearls are obtained from species in the genus. They are distinct from the distantly related, edible true oysters of the family OSTREIDAE. . 0.50
Iridescence. Goniochromism . Iridescent Coloring . Opalescence . Pearlescence . Coloring, Iridescent . Colorings, Iridescent . Iridescent Colorings . The changing of the color of an object due to variations in the angle of illumination or observation. . 0.48
Pennisetum. Bajras . Fountain Grass . Fountain Grasses . Fountaingrasses . Grasses, Fountain . Millets, Pearl . Pearl Millet . Pearl Millets . Pennisetums . Bajra . Fountaingrass . Grass, Fountain . Millet, Pearl . A plant genus of the family POACEAE. The seed is one of the millets used in EDIBLE GRAIN. It contains vitexin. The common name of buffelgrass is also used for CENCHRUS. . 0.47