• In computer programming, M-expressions (or meta-expressions) were an early proposed syntax for the Lisp programming language, inspired by contemporary...
    9 KB (985 words) - 19:41, 8 March 2025
  • Thumbnail for S-expression
    In computer programming, an S-expression (or symbolic expression, abbreviated as sexpr or sexp) is an expression in a like-named notation for nested list...
    14 KB (1,716 words) - 20:17, 4 March 2025
  • Thumbnail for Regular expression
    A regular expression (shortened as regex or regexp), sometimes referred to as rational expression, is a sequence of characters that specifies a match...
    97 KB (8,860 words) - 13:14, 22 May 2025
  • Thumbnail for Gene expression
    Gene expression is the process (including its regulation) by which information from a gene is used in the synthesis of a functional gene product that enables...
    104 KB (11,643 words) - 09:45, 24 May 2025
  • Thumbnail for Lisp (programming language)
    bracketed "M-expressions" that would be translated into S-expressions. As an example, the M-expression car[cons[A,B]] is equivalent to the S-expression (car...
    87 KB (10,027 words) - 17:17, 24 May 2025
  • Thumbnail for Expression (mathematics)
    In mathematics, an expression is a written arrangement of symbols following the context-dependent, syntactic conventions of mathematical notation. Symbols...
    44 KB (5,456 words) - 07:42, 22 May 2025
  • Facial expression is the motion and positioning of the muscles beneath the skin of the face. These movements convey the emotional state of an individual...
    31 KB (4,016 words) - 00:11, 30 January 2025
  • Transient expression, more frequently referred to "transient gene expression", is the temporary expression of genes that are expressed for a short time...
    15 KB (1,857 words) - 07:46, 28 October 2024
  • of”, and the suffix -topic, meaning "place." Ectopic expression is an abnormal gene expression in a cell type, tissue type, or developmental stage in...
    8 KB (1,023 words) - 03:05, 22 January 2024
  • gene expression Transcription (genetics) translation λ phage pBR322 Lodes, M. J.; Dillon, D. C.; Houghton, R. L.; Skeiky, Y. A. (2004). Expression cloning...
    2 KB (225 words) - 19:05, 1 September 2023
  • syntax based on M-Expressions, which were the function syntax in the original description of Lisp by John McCarthy. McCarthy's M-expressions were never implemented...
    4 KB (395 words) - 21:35, 25 December 2021
  • An emotional expression is a behavior that communicates an emotional state or attitude. It can be verbal or nonverbal, and can occur with or without self-awareness...
    47 KB (5,598 words) - 00:21, 23 May 2025
  • language may deviate from the M-expression paradigm when an alternative, more human-friendly way of showing an expression is available: A number of formatting...
    16 KB (1,381 words) - 01:13, 2 May 2025
  • A predicative expression (or just predicative) is part of a clause predicate, and is an expression that typically follows a copula or linking verb, e.g...
    9 KB (1,048 words) - 15:44, 13 March 2025
  • In computer science, a "let" expression associates a function definition with a restricted scope. The "let" expression may also be defined in mathematics...
    41 KB (5,006 words) - 18:17, 2 December 2023
  • In linguistics, a phatic expression (English: /ˈfætɪk/, FAT-ik) is a communication which primarily serves to establish or maintain social relationships...
    18 KB (2,366 words) - 22:20, 17 April 2025
  • Thumbnail for Expression vector
    An expression vector, otherwise known as an expression construct, is usually a plasmid or virus designed for gene expression in cells. The vector is used...
    34 KB (4,182 words) - 17:22, 7 December 2024
  • Thumbnail for Regulation of gene expression
    Regulation of gene expression, or gene regulation, includes a wide range of mechanisms that are used by cells to increase or decrease the production of...
    45 KB (5,236 words) - 08:23, 27 October 2024
  • (\lambda y.M[y])}  : α-conversion, renaming the bound variables in the expression. Used to avoid name collisions. ( ( λ x . M )   N ) → ( M [ x := N ]...
    89 KB (11,994 words) - 17:12, 1 May 2025
  • Gender expression (or gender presentation) is a person's behavior, mannerisms, interests, and appearance that are associated with gender in a particular...
    11 KB (1,283 words) - 20:48, 6 May 2025
  • path expressions identify an object by describing how to navigate to it in some graph (possibly implicit) of objects. For example, the path expression p...
    3 KB (408 words) - 00:23, 15 September 2024
  • A multiword expression (MWE), also called phraseme,[citation needed] is a lexeme-like unit made up of a sequence of two or more lexemes that has properties...
    7 KB (935 words) - 22:33, 4 May 2025
  • McCarthy called "m-expressions". As an example, the m-expression car[cons[A,B]] is equivalent to the s-expression (car (cons A B)). S-expressions proved popular...
    17 KB (2,021 words) - 01:08, 10 May 2025
  • The Expression Atlas is a database maintained by the European Bioinformatics Institute that provides information on gene expression patterns from RNA-Seq...
    4 KB (335 words) - 09:03, 16 November 2024
  • Thumbnail for Spatiotemporal gene expression
    Spatiotemporal gene expression is the activation of genes within specific tissues of an organism at specific times during development. Gene activation...
    12 KB (1,411 words) - 06:14, 28 October 2024
  • The Expression were an Australian synthpop band formed in Sydney in 1981 and disbanded in 1985. Their best known single, "With Closed Eyes", was released...
    12 KB (986 words) - 03:49, 9 March 2025
  • In computer science, a parsing expression grammar (PEG) is a type of analytic formal grammar, i.e. it describes a formal language in terms of a set of...
    47 KB (6,505 words) - 18:00, 1 February 2025
  • In mathematics, an expression or equation is in closed form if it is formed with constants, variables, and a set of functions considered as basic and connected...
    15 KB (1,764 words) - 02:05, 19 May 2025
  • Thumbnail for Freedom of speech
    of retaliation, censorship, or legal sanction. The right to freedom of expression has been recognised as a human right in the Universal Declaration of Human...
    99 KB (10,273 words) - 12:20, 23 May 2025
  • The T7 expression system is utilized in the field of microbiology to clone recombinant DNA using strains of E. coli. It is the most popular system for...
    6 KB (798 words) - 13:00, 16 April 2025