1. Tropical marine bivalve found chiefly off eastern Asia and Pacific coast of North America and Central America; a major source of pearls
   - Pinctada margaritifera

Derived forms: pearl oysters

Type of: oyster

Part of: genus Pinctada, Pinctada

Encyclopedia: Pearl oyster

• genus Ustilago
• genus Uta
• genus Utahraptor
• genus Utricularia
• genus Uvularia
• genus Vaccaria
• genus Vaccinium
• genus Valeriana
• genus Valerianella
• genus Vallisneria
• genus Vanda
• genus Vanellus
• genus Vanessa
• genus Vangueria
• genus Vanilla
• genus Varanus
• genus Vedalia
• genus Velociraptor
• genus Venus
• genus Veratrum
• genus Verbascum
• genus Verbena
• genus Verbesina
• genus Vernonia
• genus Veronica