Hypertext Webster Gateway: "Deltas"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Delta \Del"ta\, n.; pl. {Deltas}. [Gr. de`lta, the name of the
fourth letter of the Greek alphabet (the capital form of
which is [Delta], Eng. D), from the Ph[oe]nician name of the
corresponding letter. The Greeks called the alluvial deposit
at the mouth of the Nile, from its shape, the Delta of the
Nile.]
A tract of land shaped like the letter delta ([Delta]),
especially when the land is alluvial and inclosed between two
or more mouths of a river; as, the delta of the Ganges, of
the Nile, or of the Mississippi.
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