delta has definitions from the field of geography
1
[ noun ] (geography) a low triangular area where a river divides before entering a larger body of water

Used in print

(James Boylan, "Mutinity"...)

After three weeks ' swift sailing , however , the ship entered an area of shallow marshes and river deltas .

Related terms

geological_formation

2
[ noun ] Woman's first name, popularity rank in the U.S. is 2197
3
[ noun ] the 4th letter of the Greek alphabet

Related terms

letter Greek_alphabet

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