delta
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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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
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).
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).
Farlex Partner Medical Dictionary © Farlex 2012
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.Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
δ,
ΔAbbreviation 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.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
Δ
, δ1. Fourth letter of the Greek alphabet, delta.
2. anatomy a triangular surface.
Medical Dictionary for the Dental Professions © Farlex 2012