# expression

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## expression

1. communication of emotion through music, painting, etc.
2. Maths a variable, function, or some combination of constants, variables, or functions
3. Genetics the effect of a particular gene on the phenotype
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

## expression

[ik′spresh·ən]
(chemical engineering)
Separation of liquid from a two-phase solid-liquid system by compression under conditions that permit liquid to escape while the solid is retained between the compressing surfaces. Also known as mechanical expression.
(computer science)
A mathematical or logical statement written in a source language, consisting of a collection of operands connected by operations in a logical manner.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

## expression

(programming)
Any piece of program code in a high-level language which, when (if) its execution terminates, returns a value. In most programming languages, expressions consist of constants, variables, operators, functions, and parentheses. The operators and functions may be built-in or user defined. Languages differ on how expressions of different types may be combined - with some combination of explicit casts and implicit coercions.

The syntax of expressions generally follows conventional mathematical notation, though some languages such as Lisp or Forth have their own idiosyncratic syntax.

## expression

(1) See Expression Studio.

(2) In programming, a line of source code that returns a value when executed. An expression can comprise any combination of variables, values, operators and functions. For example, a=b+c and price=2*cost are expressions. The more complicated expression (strlen(text_string)*2) is a C example that uses a string length function and returns a value that is twice the number of characters in the string of text. See regular expression.
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References in periodicals archive ?
littoralis on adult neurogenesis in the DG of the adult mouse hippocampus using 5-bromo-2-deoxyuridine (BrdU, an indicator for cell proliferation) labeling and immunohistochemistry for doublecortin (DCX, an immature neuronal marker), which has been commonly used to investigate the proliferation of neuroblast.[18],[19] In addition, we examined expressional changes of brain-derived neurotrophic factor (BDNF) and its major receptor tropomyosin-related kinase B (TrkB), which are well known to be involved in the neurogenic process.[20],[21]
Khalid Mehmood said his simplified expressional work was a tribute to Lahore, its heritage and trust for future generations.
One major interest of this study was to already detect very early expressional cytokine changes.
(a) A self-organized heatmap shows the relative expressional data of 29 significantly altered proteins (labeled by gene name with spot ID) in the secretomes of SK-N-SH (SH) versus SH-N- AS (AS) (n=5 per group).
Lee, "Mutational and expressional analyses of ATG5, an autophagy-related gene, in gastrointestinal cancers," Pathology - Research and Practice, vol.
Owing to the method used for examining the comparative expressional analysis of BPIFA1 between patients with COMC and BSHL, only samples of RNA with a concentration above 6 ng/[micro]L were used.
This festival was 'An Ode to Bahuda' wherein the term Bahuda, taken from the Vedic verse 'ekam sat viprahbahudavadanti' exemplified the spirit of Indian philosophy, denoting plurality of expressional genres that is visibly practiced in the field of arts.
N-benzylcantharidinamide inhibits MMP-9 activity by two main ways: direct enzymatic inhibition and expressional regulation.
The Edinburgh Fringe Festival is one of the biggest platforms for expressional arts.
Very quickly in the choreographic process, we realized that none of the more lyrical or expressional aspects of Kathak would work for this production.
Al-Ajmi made his remarks on the sidelines of a ceremony to mark "World Teachers' Day", attended and patronized by His Highness the Amir, noting that His Highness' sponsorship of the event has expressional and tremendous meanings in showing appreciation, keen interest, and high place for educators.

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