1. (of a body of water) being deficient in plant nutrients, such as nitrogen or phosphorus 
2. (of a diet) being deficient in nutrition

Encyclopedia: Oligotrophic

• protozoological
• protozoologist
• protozoology
• protozoon
• protract
• protracted
• protractedly
• protractible
• protractile
• protraction
• protractive
• protractor
• protriptyline
• Protropin
• protrude
• protruding
• protrusible
• protrusile
• protrusion
• protrusive
• protuberance
• protuberant
• protuberate
• Protura
• proturan