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STERILE –adjective
1. free from living germs or microorganisms; aseptic: sterile surgical instruments.
2. incapable of producing offspring; not producing offspring.
3. barren; not producing vegetation: sterile soil.
4. Botany -
a. noting a plant in which reproductive structures fail to develop.
b. bearing no stamens or pistils.
5. not productive of results, ideas, etc.; fruitless.