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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).

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.

Δ

, δ
1. Fourth letter of the Greek alphabet, delta.
2. anatomy a triangular surface.
References in periodicals archive ?
Thus, estuarine and deltaic brackish to saline water influence may have gradually ceased at approximately 0.5 m below the peat-soil boundary as indicated by the core auger profiles of both KS.TP.10 and KS.TP.09.
The back arc basins have been filled with deltaic clastics mostly shed off adjacent shield areas.
The complex creeks network in the Indus Deltaic region, extending over an area of 170 kilometers along the 990-km coastline that Pakistan shares with the Arabian Sea can generate 900 megawatts (MW) of cheap energy, and sufficiently meet the power requirements of Karachi, according to a research conducted by the National Institute of Oceanography (NIO).
Pakistan's largest city Karachi is situated at the western margin of the deltaic region.
JEDDAH: ARAB NEWSBlessed with scenic beauty, low hills, forest, large lakes, beautiful rivers in deltaic plains, the longest beach on earth, a God-gifted geo-strategic location between SRC and ASEAN and a homogeneous culture, Bangladesh is an ideal place for tourists.
In the natural cycle of delta switching, an abandoned deltaic lobe erodes and gives rise to a new accreting one.
The Sundarbans is a UNESCO World Heritage site and the largest deltaic mangrove forest in the world with an area of 10,200 sq.
Sampling stations were selected based on terrapin sighting/capture data and habitat preferences reported by Halbrook (2003) and Koza (2006): oyster reef (n = 6), tidal river (n = 3), and deltaic tidal creeks (n = 4).
Lahore -- Participants representing civil society, water experts, researchers, activists, environmentalists, politicians and deltaic and fishing communities have expressed their concern over the ecological destruction of Indus River and Indus Delta and demanded restoration of the natural flow of the Indus.
Also, low lying deltaic countries like Bangladesh and many small island states are likely to be severely affected.
Sounding quite excited about this new path-breaking project, SS Bhasin, Managing Director, Bhasin Group said, "Whether the marine species in Rift Valley lakes of Africa or the life underwater in the cascading River Ganges in the deltaic Sundarbans, at the Blue Planet, people will get to see a geographically distinct eco-system including flora and fauna of a particular water body anywhere in the world which includes aquatic wonders such as sharks, penguins, walrus, octopus and dolphins."
These previously discovered eurypterids are from the western exposure of the Campbellton Formation and are believed to have inhabited a coastal deltaic setting, along with a rich vertebrate assemblage that included cephalaspids, placoderms, acanthodians, and sharks.