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Definition of: basal
(bā′səl) adjective
1. Pertaining to, of, or at the base.
2. Basic; fundamental.
3. Physiol. Designating a standard of reference or comparison: basal metabolism.
4. Surg. Serving to prepare for deeper levels of unconsciousness: basal anesthesia preliminary to surgical anesthesia.
—ba′sal·ly adverb
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