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volatile organic compound
Any organic chemical compound that can significantly vaporize under conditions of normal atmospheric temperature and pressure.
persistent organic pollutant
Organic compounds, predominantly synthetic, that are resistant to environmental degradation through chemical, biological, and photolytic processes, and that are often associated with health risks.
organic brain syndrome
any disorder of mental function due to physiologic (organic) causes rather than mental causes
organic brain syndromes
organ pipe cactuses
organ pipe cactus
A cactus (family Cactaceae) (Stenocereus thurberi, syn. Glandulicereus thurberi), widespread in Mexico.
free-living organism
An organism that is not directly dependent on another organism for survival.
prebiotic organic synthesis
Any plausible pathway by which the molecular precursors of life (amino acids, bases and ribose phosphates) may have been formed in the early Earth.