What is a synonym for delta?

Answer 1

A delta could be a deposit, river mouth, or alluvial fan. It is the land created at the mouth of a river by accumulated silt.

Expansion with history and explanation:

The fourth letter in the Greek alphabet is delta. It is equivalent to the letter D.

Small delta: δ

Large/capital delta: Δ

Here is a set of synonyms for the English word delta:

Estuary; alluvium; alluvial plain; floodplain; opening; incremental value.

The word delta especially refers to the area at the mouth of a river where alluvial deposits tend to accumulate. The river is forced to subdivide owing to this accumulating sediment and the river mouth thus fans out in a triangular shape like the Greek capital letter Δ. The Greeks referred to the mouth of the river Nile as "the Delta of the Nile".

In mathematics, especially in calculus, the Greek letter delta is used as a symbol that represents a small increment in the value of a variable.

One more synonym/meaning of delta is "opening". Tent doors have often been triangular (delta-shaped). The Greeks took the name of their fourth letter from the Phoenician word - daleth - meaning "tent door".