transition zone

transition zone
transitional zone 1. any anatomical region that marks the point at which the constituents of a structure change from one type to another. 2. either of two bilobed areas of the prostate found deep to the central zone and surrounding the prostatic urethra near its angle with the preprostatic part of the urethra; this zone enlarges through the male life cycle and is the site of benign prostatic hyperplasia.

Medical dictionary. 2011.

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  • Transition zone — Tran*si tion zone (Biogeography) The zone lying between the Boreal and Sonoran zones of North America. It includes an eastern or humid subdivision and a western arid one of corresponding temperature comprising the northern Great Plains and the… …   The Collaborative International Dictionary of English

  • transition zone — pereinamoji sritis statusas T sritis fizika atitikmenys: angl. transition region; transition zone vok. Übergangsgebiet, n; Übergangszone, m rus. переходная зона, f pranc. zone de transition, f …   Fizikos terminų žodynas

  • transition zone — pereinamoji zona statusas T sritis fizika atitikmenys: angl. transition region; transition zone vok. Übergangszone, f rus. переходная зона, f pranc. zone de transition, f …   Fizikos terminų žodynas

  • Transition zone — In seismology, the region between about 400 km and 650 km depth, the lower area of the upper mantle. That is called Transition Zone …   Wikipedia

  • transition zone —    1. Portion of bedrock in the vadose zone that is between the epikarst zone and the phreatic zone, is relatively waterless and unfractured, but is locally breached by discrete percolation points (vadose shafts.)    2. The zone in which the… …   Lexicon of Cave and Karst Terminology

  • transition zone — an abrupt change or lack of structure between two regions of an otolith. May occur during metamorphosis from a larval stage, transition from the sea to fresh water, etc …   Dictionary of ichthyology

  • transition zone — A marked change in the annual growth pattern requiring an adjustment to age reading criteria …   Fisheries — dictionary

  • transition zone — noun a) Any of several physical zones in which the properties, or the behaviour of something undergoes a radical change b) The stage in the flow or a fluid during which it changes from laminar to turbulent …   Wiktionary

  • Brittle-ductile transition zone — [ continental crust and changes in dominant deformation mechanisms and fault rocks in a conceptual vertical fault zone. ] The brittle ductile transition zone is the strongest part of the Earth s crust. For quartz and feldspar rich rocks in… …   Wikipedia

  • zone — noun ADJECTIVE ▪ narrow, wide ▪ marginal, peripheral, transition, transitional, twilight ▪ a transition zone between tropical and arid vegetations …   Collocations dictionary

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