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SAO is an Australian biscuit. It is a dry, square biscuit (approximately 2 inches 5cm on a side) often used as a cheese biscuit of many layers (the advertisement used to say "layer upon layer upon layer upon layer"). The name is reputedly from Salvation Army Officer.

Sa"o (?), n. Zool.

Any marine annelid of the genus Hyalinaecia, especially H. tubicola of Europe, which inhabits a transparent movable tube resembling a quill in color and texture.


© Webster 1913.

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