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S.I.

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• Sia

  Serial Interface Adaptor Sia sialic acids

• Siabon

  noun 1. a hybrid animal bred from a gibbon and a siamang.

• Siad Barre

  noun 1. Muhammad, 1919–1995, Somali army officer and political leader: president 1969–91.

• Siadh

  SIADH syndrome of inappropriate secretion of antidiuretic hormone

• Sial

  noun, Geology. 1. the assemblage of rocks, rich in silica and alumina, that comprise the continental portions of the upper layer of the earth’s crust. noun 1. the silicon-rich and aluminium-rich rocks of the earth’s continental upper crust, the most abundant individual rock being granite

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