Hypertext Webster Gateway: "underside"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Underside \Un"der*side`\, n.
The lower or lowest side of anything. --Paley.
From WordNet (r) 1.7 (wn)
underside
n : the lower side of anything [syn: {bottom}, {undersurface}]
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