A dot can mean several things, depending on the context.
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It depends on the context. A dot could be:a decimal pointabove a digit after a decimal: an indication of recurrenceif one of three dots: it could stand for "and so on" eg 1, 2, 3, ...a symbol for multiplication: eg a.b = aba dot product in vectorsa mathematical operation in group theory.
the athmatical tirm for a dot representing a area on a plain is a point
decigram
it stands for milligrams
grams or gallon