1. The altitude of the base of a mass of cloud; measured by a ceilometer

Encyclopedia: Cloud base

• pH
• pH scale
• phacelia
• Phacelia campanularia
• Phacelia minor
• Phacelia tanacetifolia
• Phacelia whitlavia
• Phacochoerus
• phacoemulsification
• phaeochromocytoma
• Phaeophyceae
• Phaeophyta
• Phaethon
• Phaethontidae
• phaeton
• phage
• phagocyte
• phagocytic
• phagocytosis
• Phagun
• phaius
• Phalacrocoracidae
• Phalacrocorax
• Phalacrocorax carbo
• phalacrosis