transition

transition
1. Passage from one condition or one part to another. 2. In polynucleic acid, replacement of a purine base by another purine base or a pyrimidine base by a different pyrimidine. [L. transitio, fr. transeo, pp. -itus, to go across]
- cervicothoracic t. the junction between the last cervical vertebra and first thoracic vertebra.
- isomeric t. the t. of a nuclear isomer to a lower quantum state; e.g., 131mXe131Xe + γ.

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tran·si·tion tran(t)s-'ish-ən, tranz-, chiefly Brit tran(t)s-'izh- n
1) passage from one state or stage to another esp an abrupt change in energy state or level (as of an atomic nucleus or a molecule) usu. accompanied by loss or gain of a single quantum of energy
2) a genetic mutation in RNA or DNA that results from the substitution of one purine base for the other or of one pyrimidine base for the other

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tran·si·tion (tran-zĭґshən) [L. transitio crossing over] 1. a passage or change from one state or condition to another. 2. in molecular genetics, a point mutation in which one purine base replaces another purine or one pyrimidine base replaces another pyrimidine. Cf. transversion.

Medical dictionary. 2011.

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  • transition — [ trɑ̃zisjɔ̃ ] n. f. • 1501 « procédé rhétorique »; lat. transitio, proprt « passage » 1 ♦ Manière de passer de l expression d une idée à une autre, de lier les parties d un discours. ⇒ passage. L art des transitions. Ménager les transitions.… …   Encyclopédie Universelle

  • Transition — or transitional may refer to:*Transition (genetics) *Transitional fossil *Transition (grappling) *Transition metal *Transition state * Transition: an operation of a finite state machine *Transition function *Transition flying car *Transition… …   Wikipedia

  • transition — tran‧si‧tion [trænˈzɪʆn, ˈsɪ ] noun [countable, uncountable] formal the act or process of changing from one state or form to another: • The computer company went through a difficult transition period. • Three directors are expected to retire… …   Financial and business terms

  • Transition — (lat. für ‚Übergang‘, trans·ire ‚überschreiten, übergehen‘) bezeichnet: Transition (Zeitschrift), US amerikanisches vierteljährliches Magazin für schwarze Intellektuelle Terrafugia Transition, ein US amerikanisches Flugauto beim Snowboarden bzw.… …   Deutsch Wikipedia

  • Transition — Tran*si tion, n. [L. transitio: cf. F. transition. See {Transient}.] 1. Passage from one place or state to another; charge; as, the transition of the weather from hot to cold. [1913 Webster] There is no death, what seems so is transition.… …   The Collaborative International Dictionary of English

  • transition — TRANSITION. s. f. Passage d une matiere à une autre, d un raisonnement a un autre, par des termes par des discours qui les lient. Belle transition, aisee, ingenieuse. il a passé à une nouvelle matiere sans aucune transition. les transitions font… …   Dictionnaire de l'Académie française

  • transition — [tran zish′ən, transish′ən] n. [L transitio < transitus: see TRANSIT] 1. a) a passing from one condition, form, stage, activity, place, etc. to another b) the period of such passing 2. a word, phrase, sentence, or group of sentences that… …   English World dictionary

  • transition — transition. См. транзиция. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Transition — (lat.), Übergang, Übergehung; transitiv, übergehend; Transitivum, s. Verbum …   Meyers Großes Konversations-Lexikon

  • Transition — (lat.), Übergang; Übergehung; transitīv, überleitend, hinübergehend; Transitivum, s. Verbum …   Kleines Konversations-Lexikon

  • Transition — Transition, lat. transitus, Uebergang; Uebergehung; transitiv, übergehend; ein transitives Verbum ist ein solches, dessen Thätigkeit ein Object hat; transitorisch, zum Ueber oder Durchgang bestimmt; vorübergehend, vergänglich …   Herders Conversations-Lexikon

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