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delta

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noun del·ta \ˈdel-tə\

Definition of delta

  1. 1 :  the 4th letter of the Greek alphabet — see alphabet table

  2. 2 :  something shaped like a capital Greek delta; especially, geology :  the alluvial deposit at the mouth of a river the Mississippi Delta

  3. 3 mathematics :  an increment of a variable —symbol Δ

  4. 4 :  delta wave

deltaic

play \del-ˈtā-ik\ adjective

Origin and Etymology of delta

Middle English deltha, from Greek delta, of Semitic origin; akin to Hebrew dāleth daleth


First Known Use: 13th century


2

delta

adjective del·ta

Definition of delta

chemistry

  1. :  fourth in position in the structure of an organic (see 1organic 3b(1)) molecule from a particular group or atom —symbol δδ

Origin and Etymology of delta

see 1delta


First Known Use: circa 1929

Other Chemical Engineering Terms


Delta

del·ta

Definition of Delta

  1. —a communications code word for the letter d

1952

First Known Use of delta

1952


Delta

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geographical name Del·ta \ˈdel-tə\

Definition of Delta

  1. municipality south and southeast of Vancouver in southwestern British Columbia, Canada population 99,863


DELTA Defined for English Language Learners

1

delta

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noun del·ta \ˈdel-tə\

Definition of delta for English Language Learners

  • : the fourth letter of the Greek alphabet

  • : a piece of land shaped like a triangle that is formed when a river splits into smaller rivers before it flows into an ocean

  • : an area of low land along the Mississippi River that is mainly in the state of Mississippi


DELTA Defined for Kids

delta

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noun del·ta \ˈdel-tə\

Definition of delta for Students

  1. :  a piece of land in the shape of a triangle or fan made by deposits of mud and sand at the mouth of a river


Medical Dictionary

1

delta

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noun del·ta \ˈdel-tə\

Medical Definition of delta

  1. 1:  the fourth letter of the Greek alphabet—symbol Δ or δ

  2. 2:  any of various things felt to resemble a capital Δ; especially :  the triangular terminus of a pattern in a fingerprint formed either by bifurcation of a ridge or by divergence of two ridges that are parallel beyond it

  3. 3:  delta wave


2

delta

adjective del·ta
variants: or

δ-

Medical Definition of delta

  1. 1:  of or relating to one of four or more closely related chemical substances the delta chain of fetal hemoglobin δ-yohimbine—used somewhat arbitrarily to specify ordinal relationship or a particular physical form and especially one that is allotropic, isomeric, or stereoisomeric (as in δ-benzene hexachloride)

  2. 2:  fourth in position in the structure of an organic molecule from a particular group or atom; also :  having a structure characterized by such a position δ-hydroxy acids δ-lactones


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