Distinctive smells, especially unpleasant ones; scents that can be detected by the sense of smell. The American spelling of 'odours'.
From Latin 'odor' meaning smell or scent, related to 'olere' (to smell). The word entered English through Old French in the 13th century, maintaining its basic meaning throughout history.
Humans can distinguish over one trillion different odors, yet we often lack vocabulary to describe them precisely - unlike colors or sounds! Our sense of smell is directly connected to the limbic system, making odors powerful triggers for memories and emotions.
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