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

• sermoniser
• sermonize
• sermonizer
• serologic
• serological
• serologist
• serology
• serosa
• serotine
• serotinous
• serotonin
• serotype
• serous
• serous membrane
• serovar
• serow
• Serpasil
• Serpens
• dirty tricks
• dirty war
• dirty word
• dirty-faced
• dirty-minded
• dirtying
• dis