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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 ?
From 1 May, Delta Connection carrier Atlantic Coast Airlines will operate two nonstop round trip flights between Delta Air Lines' hub in Cincinnati and Washington Reagan National Airport.
Today's announcement builds on our earlier announcements of expanded service in the northeast using Delta's wide range of products and services including the Delta Shuttle, Delta Express and the Delta Connection carriers," said Mark A.
carrier across the Atlantic, offering daily flights to 497 destinations in 87 countries on Delta, Song, Delta Shuttle, the Delta Connection carriers and its worldwide partners.
Delta Connection will add a jet service between Delta Air Lines' hub in Cincinnati and Memphis, Tenn.
We are delighted to welcome Sioux Falls customers to the Delta network by offering frequent flight selections through our Cincinnati hub, an airport regarded for customer convenience," said Fred Buttrell, president and chief executive officer, Delta Connection Inc.
Comair will also operate a Delta Connection service between Atlanta and Wilkes-Barre/Scranton, Pa.
With these new services, Trans States Airlines will operate 21 aircraft to 15 cities as a Delta Connection carrier.
Additionally, Delta Connection this fall will upgrade its four existing 50-passenger regional jet flights at Gulfport/Biloxi with 70-seat Bombardier CRJ700s.
Effective from 7 April, Delta Connection will operate the CRJ-700 between Atlanta and six markets - Augusta, Ga.
SkyWest had been providing service as a commuter partner under the Delta code designator with 39 daily, nonstop Delta Connection flights from Los Angeles to six destinations, including Bakersfield, Fresno, Monterey, Palm Springs, San Diego and Santa Barbara.
The ERJ 145 regional jet, painted in the Delta Connection banner, will be placed into service on May 31 for Delta Air Lines .
On 7 April 2002, Delta Connection will launch the Huntington service, which will consist of three daily nonstop flights.