delta
Symbol for change
Delta is a Greek letter (Δ, δ) widely used in mathematics and science to indicate change or difference: delta-v in physics, delta t for elapsed time.
The triangular shape of the uppercase letter gives its name to river deltas—fan-shaped deposits of sediment where rivers meet larger bodies of water: the Mississippi delta, the Nile delta.
In aviation and military contexts, delta describes triangular wing configurations: delta wing.
The word also denotes a fourth item in a series or, in informal usage, a change or adjustment: What's the delta between the two versions? (Capitalized Delta is the airline, NATO phonetic letter, or proper name.)
To make different
- differenceWay things contrast
- incrementUnit of increase
- variationChange from a norm
- derivativeFunction's rate of change
differential · finite · infinitesimal · discriminant · Dirac · function · notation · symbol
Language's letter system
- alphaFirst Greek letter
- betaGreek alphabet's second letter
- gammaGreek alphabet's third
- epsilonGreek fifth letter
symbol · letter · fourth · uppercase · lowercase · mathematics · physics · notation
change
To make different
- differenceWay things contrast
- incrementUnit of increase
- variationChange from a norm
derivative · differential · finite · infinitesimal · discriminant · Dirac · function · notation · symbol · equation
alphabet
Language's letter system
epsilon · symbol · letter · fourth · uppercase · lowercase · mathematics · physics · notation · triangular
alluvium
Water-deposited loose sediment
- sedimentParticles settling in liquid
- estuaryTidal mixing zone
- floodplainFlood-prone riverside lowland
silt · deposition · wetland · marsh · tributary · meander · oxbow · levee · riparian · braided
force
Strength or compulsion
unit · squadron · tactics · covert · elite · mission · training · counterterrorism · insertion · extraction
- earth scienceatmosphere, earthquake, geology, volcano, crust
- coastal featuresshore, coast, beach, bay, cliff
- coastal geographyarchipelago, atoll, islet, cay, skerry
- Greek lettersalpha, beta, gamma, epsilon, zeta
- natural habitatsforest, jungle, swamp, marsh, wetland
- Nile RiverNile River, White Nile, Blue Nile, Egypt, Sudan
- deltoid musclesTriangular shoulder muscles
- river deltaAlluvial deposit at mouth
- delta wavesLow-frequency brain oscillations
- Delta ForceElite Army special missions unit
- Nile DeltaEgyptian river's alluvial plain
- Mississippi DeltaRiver's fan-shaped lowland
deltoid, deltas, delts, deltoids, river delta, Delta Force, delta blues, delta wing