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delta

delta

12 3.3
Low flat land at a river mouth where the river splits and drops soil
  • noun
  • /ˈdɛltə/
translation icon : delta
  • This is your Mekong Delta and you wanna stay out of it.
  • river delta
  • form a delta
  • coastal delta

Dried riverbeds, river deltas, flood plains.

Examples

  • The Nile River forms a rich and fertile delta at its mouth, where it meets the Mediterranean Sea.

  • Since the early 1980s, though, the delta has undergone a remarkable if far-from-complete comeback.

    Academic text (2001)
  • Down at that end of the county, it's still mostly fertile delta land.

    Fiction book (1993)
  • A major water source for Southern California's agricultural area, the delta had been seriously affected by increasing demand over the years.

    Academic text (1998)
  • The watery land of the great delta was home to many animals, including reed wolves.

    Fiction book (1990)
  • Forecasters are calling for up to a foot of rain in the coastal areas as this storm makes its way across the delta, starting overnight.

  • Every year low lying farmland and communities in the Volga Delta were destroyed, driving yet more people to the cities.

  • There it forms a large delta with vast tugai wetlands.

    Academic text (2011)
  • Little bitterns were common in the delta, but the elusive, well-camouflaged marsh birds were heard more often than seen.

    Fiction book (1990)
  • The eastern part of Venezuela next to Guyana, where the Orinoco River delta is and it flows out to the Atlantic.

Compounds

delta wave
  • Specialized
1 7.2

A slow, large brain wave that appears during deep, dreamless sleep

delta wing
  • Specialized
1 7.0

A triangular wing used on very fast jets

delta hepatitis
  • Specialized
6.7

A severe liver infection caused by the hepatitis D virus that often happens with hepatitis B

delta iron
  • Specialized
9.9

A form of iron that exists at very high heat between 1403°C and 1532°C just below its melting point

delta ray
  • Specialized
9.9

A fast electron knocked out of an atom when radiation hits it

delta rhythm
  • Specialized
7.7

A very slow, large brain wave that appears during deep dreamless sleep

Kronecker delta
  • Specialized
9.9

A rule that gives 1 when two numbers are the same and 0 when they are different

hepatitis delta
  • Specialized
7.3

A serious liver infection caused by the hepatitis D virus that happens in people who already have hepatitis B

How Big

alluvial plain
  • Specialized
1 5.8
delta
12 3.3
spit
14 8.2
sandbar
  • US
11 2.8

Surface Forms

delta singular
deltas plural

Etymology

Delta for the land at a river mouth got its name because the area often looks like the Greek letter Δ, a flat 'triangle' of soil left when the river spreads out. So, a river delta is the triangle-shaped land made by the river as it enters a larger body of water.