Examlex
Which of the following gases was not present in the Earth's early atmosphere but appeared after the evolution of certain organisms?
Q.D.
A medical abbreviation for "quaque die," which means once a day; used in prescriptions to indicate the frequency of medication intake.
IU
International Units, a measurement used to quantify vitamins, hormones, some medications, vaccines, and similar biologically active substances.
Coding Clinic
The Coding Clinic provides official guidance, clarification, and examples on the application of coding rules and conventions found in medical classification systems.
AHA
American Heart Association, a non-profit organization in the United States that focuses on cardiovascular health education, research, and advocacy.
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