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

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.

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.
References in periodicals archive ?
Semi-quantitative real-time PCR analysis showed that there was no significant expressional change of Cyp19 gene among experimental groups (Figure 4B).
20) Logan Valley was distinguished on narrow grounds as limited to a labor dispute involving one of the center's tenants and occurring under conditions where no realistic expressional alternative existed.
To examine the expressional difference in CYP genes, we performed RT-PCR analysis of these three CYP transcripts.
Similar developmental expressional patterns were observed for 17[alpha]-hydroxylase and 3[beta]-hydroxysteroid dehydrogenase in the ovaries of female piglets, but without significant aromatase expression.
The results of the present study will provide a molecular basis for the function and structure of the porcine CS-3 gene and for further investigations into the expressional regulation of porcine CS-3 and how it modulates calcineurin during muscle development.
In addition, we examined expressional changes of brain-derived neurotrophic factor (BDNF) and its major receptor tropomyosin-related kinase B (TrkB) using Western blotting analysis.
Khalid Mehmood said his simplified expressional work was a tribute to Lahore, its heritage and trust for future generations.
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.
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.
Human consciousness, after evoking the senses, perception and thinking, observes the world, its material and expressional being.