1. The equipotential surface of the Earth, equivalent to sea level over the oceans

Derived forms: geoids

Encyclopedia: Geoid

• family Bittacidae
• family Blastodiaceae
• family Blattidae
• family Blechnaceae
• family Blenniidae
• family Boidae
• family Boletaceae
• family Bombacaceae
• family Bombycidae
• family Bombycillidae
• family Bombyliidae
• family Boraginaceae
• family Bothidae
• family Bovidae
• family Bradypodidae
• family Bramidae
• family Branchiobdellidae
• family Branchiostegidae
• family Branchiostomidae
• family Brassicaceae
• family Brevicipitidae
• family Bromeliaceae
• family Brotulidae
• family Bruchidae
• family Bryaceae