OP stands for various terms. Discover the full forms, meanings, and possible interpretations of OP across different fields and industries.
An addictive narcotic drug that is derived from the unripe seedpods of the opium poppy. Preparations of opium were called laudanum. Derivatives of opium include paregoric, morphine, and heroin. For centuries, opium was used as a painkiller in the Middle East and Asia. It gained great popularity in Europe and the European colonies in the 18th century and became a main ingredient in patent medicines that patients could easily obtain without prescriptions. Many people became addicted to opium.
BritishHealthMedicineA temperature measuring device through which the observer sights the heated object and compares its incandescence with that of an electrically heated filament whose brightness can be regulated; or the intensity of the light emitted from the object may be varied through filters and compared with a constant light source.
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