[ˈdɛltə], (Noun)

Definitions:
- the fourth letter of the Greek alphabet (Δ, δ), transliterated as ‘d’

- a code word representing the letter D, used in radio communication

- a difference between two things or values
(e.g: there's a delta between perception and reality)


Phrases:

Origin:
Greek, from Phoenician daleth

[ˈdɛltə], (Symbol)

Definitions:
- variation of a variable or function

- a finite increment

- the discriminant of a quadratic equation

- declination


Phrases:

Origin:
Greek, from Phoenician daleth

[ˈdɛltə], (Noun)

Definitions:
- a triangular tract of sediment deposited at the mouth of a river, typically where it diverges into several outlets
(e.g: the Nile delta)


Phrases:

Origin:
mid 16th century: originally specifically as the Delta (of the River Nile), from the shape of the Greek letter (see delta)