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 ?
As we drive away, I glimpse Rosie watching us; her face back to the expressionless shop dummy.
BEIRUT: Palestinian mothers weep over the bodies of children whose expressionless faces indicate their untimely fate.
AIDEN GRIMSHAW Expressionless Aiden sings ballad in monotone voice.
He stood expressionless in the dock at Exeter Crown Court as the judge, Mr Justice Jack, told him he would serve a minimum 30 years' imprisonment for the double murder.
He looked expressionless as he was led to a waiting van on another day of questioning by prosecutors.
"We are using projections and we do quite a bit with masks as we are looking at identity, conforming, being an outsider so the expressionless masks work really well with looking at these issues," she says.
Byline: Umm Ebrahim is only 40 years old, but her face looks old and expressionless.
Botched botox is the biggest offender with many people complaining that the treatment has worn off too quickly or has caused the brow to become over taut, leaving the face expressionless.
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. Before it can explore an environment or complete a task, it requires instructions for execution of basic movements, decision-making and mapmaking.
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.