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delta

 [del´tah]
1. the fourth letter of the Greek alphabet, Δ or δ; used in chemical names to denote the fourth of a series of isomeric compounds or the carbon atom fourth from the carboxyl group, or to denote the fourth of any series.
2. a triangular area.

Δ

1. Fourth letter of the Greek alphabet, delta.
2. In chemistry, denotes a double bond, usually with a superscript to indicate position in a chain (Δ5), application of heat in a reaction (A B), absence of heat treatment (), distance between two atoms in a molecule, or position of a substituent located on the fourth atom from the carboxyl or other primary functional group (δ); change (Δ); thickness (δ); chemical shift in NMR (δ).
3. anatomy a triangular surface.

del·ta (Δ),

(del'tă),
1. Fourth letter of the Greek alphabet, Δ (capital), δ (lower case).

δ

/δ/ (delta, the fourth letter of the Greek alphabet) heavy chain of IgD; δ chain of hemoglobin.

delta

/del·ta/ (delt´ah)
1. the fourth letter of the Greek alphabet; see also δ-.
2. a triangular area.

delta

[del′tə]
Δ, δ, fourth letter of the Greek alphabet.

YY1

A gene on chromosome 14q that encodes a ubiquitous transcription factor belonging to the GLI-Kruppel class of zinc finger proteins, which directs histone deacetylases or histone acetyltransferases to myriad promoters activating or repressing their activity, implicating histone modification in YY1 activity.

δ,

Δ
Abbreviation for delta; diopter.

del·ta

(Δ, δ) (del'tă)
1. Fourth letter of the Greek alphabet.
2. chemistry A double bond, usually with a superscript to indicate position in a chain (Δ5); application of heat in a reaction (A B); absence of heat treatment (Δ); distance between two atoms in a molecule, or position of a substituent located on the fourth atom from the carboxyl or other primary functional group (δ); change (Δ); thickness (δ); chemical shift in NMR (δ).
3. anatomy A triangular surface.

delta,

n a Greek letter symbolized by upper case Δ or lower case δ. See also Greek letters.

Δ

, δ
1. Fourth letter of the Greek alphabet, delta.
2. anatomy a triangular surface.

delta

1. the fourth letter of the Greek alphabet, Δ or δ; used in chemical names to denote the fourth of a series of isomeric compounds or the carbon atom fourth from the carboxyl group, or to denote the fourth of any series.
2. a triangular area.

delta T lymphocyte
see T lymphocyte.
References in periodicals archive ?
Delta and the Delta Connection carriers offer service to 330 destinations in 61 countries on six continents.
All Delta and Delta Connection flights serving Los Angeles offer customers the option of First Class, Economy Comfort or Economy seating, along with in-flight Wi-Fi.
Compass, a Delta Connection carrier, provides approximately 190 daily flights to over 50 Delta Air Lines (NYSE: DAL) destinations.
SkyWest said it plans to remove the 66 CRJ200 aircraft from existing Delta Connection service between August 2012 and December 2015.
Delta intends for some of these flights, including all of those from operated from ExpressJet's Salt Lake City hub, to be awarded to another Delta Connection carrier.
Delta gave notice at the end of March that it intended to terminate the Delta Connection agreement with Mesa and its subsidiary Freedom Airlines.
Delta Air Lines (Other OTC:DALRQ) has added 22 new Delta Connection flights from Albany, Massena, Ogdensburg and Watertown, expanding its service in upstate New York.
Delta Air Lines has announced the impending completion of its transition to handle all Delta Connection customer service and baggage operations in Atlanta.