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 ?
BEIRUT: Palestinian mothers weep over the bodies of children whose expressionless faces indicate their untimely fate.
Facing the truth: Dancers from Fusion use expressionless masks to make the point that, for many young people, creating an identity is an important part of growing-up.
Settlers' faces are frightened or get unaware of attack; Indians' faces are expressionless or seem savage.
Although somewhat expressionless, Woodman's reading is praiseworthy for the voices he creates for the numerous characters.
At least the cat would appear embarrassed; a robot would just sit there expressionless.
With some effort, the entire choir can be heard and the expressionless faces of children can be seen, all boys, whose voices soar together, breaking the air's purity.
The attorney said in a monotone, expressionless voice, "Since you are an expert on holsters, we have some questions about an acquisition of one holster manufacturer by another.
Erin Sullivan's razor sharp guitar progressions and expressionless vocals cut through Lars Finberg's cold steel automatic drumming and Min Yee's throbbing bass lines.
Lots of celebrities have stretched, expressionless faces, suggesting they've had treatment, but do they really look that much better?
And they will never rail to show how their bodies' attenuated, expressionless movements can build drama (by working on your personal associations and projections) and make your heart ache.
With corn and soybean prices rising, smiles seemed to replace frowns or expressionless producers of recent years.