No, the word "odor" does not inherently mean a bad smell, though it is frequently used in everyday conversation to imply something unpleasant. In scientific, medical, and technical terminology, "odor" is a neutral sensory descriptor referring to any airborne chemical compound that triggers olfactory receptors, whether that smell is sweet, fruity, floral, or foul. To clarify the pleasantness or unpleasantness of a specific smell, speakers and writers typically pair odor with qualifying adjectives such as a "sweet odor" or a "foul odor" to avoid ambiguity.
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