SI

SI Système International d'Unités, or International System of Units. See SI unit, under unit.

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Si silicon.

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Si

The symbol for the element silicon.

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SI

abbr.

Système International (d'Unités) (International System of Units)

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SI,

n small intestine channel; an acupuncture channel running from the hand to the face along the ulnar surface of the arm and associated with the heart (HT) channel. See also HT.

SI.

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SI(J),

n See sacroiliac joint.

SI(J).

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Si

chemical symbol, silicon.