From Wikipedia, the free encyclopedia

Transition or transitional may refer to:

Mathematics, science, and technology[edit]


  • Transition (genetics), a point mutation that changes a purine nucleotide to another purine (A ↔ G) or a pyrimidine nucleotide to another pyrimidine (C ↔ T)
  • Transitional fossil, any fossilized remains of a lifeform that exhibits the characteristics of two distinct taxonomic groups
  • A phase during childbirth contractions during which the cervix completes its dilation

Gender and sex[edit]

  • Gender transitioning, the process of changing one's gender presentation to accord with one's internal sense of one's gender – the idea of what it means to be a man or woman
  • Sex reassignment therapy, the physical aspect of a gender transition



  • Transition metal, either an element whose atom has an incomplete d sub-shell, or any element in the d-block of the periodic table
  • Transition state, of a chemical reaction is a particular configuration along the reaction coordinate
  • SRM transition, the precursor and product ion pair in Selected reaction monitoring (SRM) in analytical chemistry


Other uses in technology[edit]

Government and politics[edit]

Arts and entertainment[edit]


  • Transition (fiction), a narrative element or general aspects of writing style that signal changes in a story
  • Transition (linguistics), a certain word, expression, or other device that gives text or speech greater cohesion by making it more explicit


Film, radio, and television[edit]




Other arts[edit]


Other uses[edit]

See also[edit]