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Not exactly. In the most technical defintion of "prefix," it does, since "bin-" comes before "-ary". However, in this case, "bin-" is a combining form - closer to a root word, but unable to stand on its own. It means "two." For example, in a binary numbering system, there are only two numbers, 1 and 0.

"-ary" is a suffix that means "pertaining to."

As a prefix, "bi-" or "bin-" also involves the number 2, in the sense of "twice, two, by twos, or having two." It is attached to root words to indicate some type of duplicity. For example: bifocal, bilateral, biweekly, binaural, binocular.

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13y ago

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