delta
delta Lexical Profile
delta Game Scores & Validity
• noun
A low, typically triangular or fan-shaped alluvial tract of sediment deposited at the mouth of a river where it diverges into several outlets before entering a slower-moving or standing body of water such as an ocean, sea, or lake.
"Fertile soils carried downstream over millennia have made the river delta one of the most productive agricultural regions in the country."
The fourth letter of the Greek alphabet (Δ, δ), transliterated as 'd', or a symbol, object, or designation shaped like the uppercase triangular letter.
"In physics and calculus equations, an uppercase delta is placed before a variable to represent a finite change in that quantity."
A quantitative difference, incremental change, or margin of variation between two values, states, or outcomes, especially in mathematics, finance, and business.
"The analysts examined the delta between projected quarterly revenue and actual sales to identify where the forecast had gone wrong."
• Rhymes for delta
Word Origin & Etymology
Borrowed via Latin from Ancient Greek delta (Δ, δ), the fourth letter of the Greek alphabet, which came from the Phoenician letter daleth meaning "door" or "tent flap." The Greek historian Herodotus first applied the word to the triangular alluvial plain at the mouth of the Nile River because its shape resembled the uppercase letter Δ.