How is a gram represented in abbreviation?

A gram is represented in abbreviation as "g" or "gm." This abbreviation is widely accepted in medical and scientific contexts, making it clear and easily recognizable for anyone involved in healthcare or medication administration. The use of "g" indicates grams in a concise manner, while "gm" serves as an alternative that may be less commonly used but is still understood in the field.

The other options represent different measurements: "gr." refers to grains, which is an older unit of measure not as commonly used today, particularly in the context of most medication dosages. "cc" stands for cubic centimeters, a volume measurement, typically used for liquid medications, and "gtt." represents drops, which is a measurement used primarily for liquid medications in specific dosages. Understanding these distinctions is crucial for proper medication administration and dosage calculations.