transition

transition

1. Music

a. a movement from one key to another; modulation

b. a linking passage between two divisions in a composition; bridge

2. a style of architecture that was used in western Europe in the late 11th and early 12th century, characterized by late Romanesque forms combined with early Gothic details

3. Physics

a. any change that results in a change of physical properties of a substance or system, such as a change of phase or molecular structure

b. a change in the configuration of an atomic nucleus, involving either a change in energy level resulting from the emission of a gamma-ray photon or a transformation to another element or isotope

4. a sentence, passage, etc., that connects a topic to one that follows or that links sections of a written work

Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Transition

 

in biology, a type of mutation involving replacement of the nitrogenous base in deoxyribonucleic acid (DNA). In transition, one purine base is replaced by another purine base (adenine for thymine, or vice versa), and the pyrimidine base by another pyrimidine base (guanine for cystosine, or vice versa).

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

transition

[tran′zish·ən]

(cell and molecular biology)

A mutation resulting from the substitution in deoxyribonucleic acid or ribonucleic acid of one purine or pyrimidine for another.

(communications)

Change from one circuit condition to the other; for example, the change from mark to space or from space to mark.

(quantum mechanics)

The change of a quantum-mechanical system from one energy state to another.

(thermodynamics)

A change of a substance from one of the three states of matter to another.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

transition

i. The change in the state of a helicopter from hover to movement in a horizontal direction, and vice versa.
ii. A sudden changeover from a blind instrument approach to visual on first sighting the runway.
iii. The change(s) involved in passing from flying one type of aircraft to flying another, especially in connection with transition training.
iv. A published procedure (DP Transition) used to connect the basic DP (departure procedure) to one of several en route airways/jet routes, or a published procedure (STAR Transition) used to connect one of several en route airways/jet routes to the basic STAR (standard terminal arrival route).
v. The position at which the laminar flow changes into a turbulent flow on an airfoil.

An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved

transition

A change from one condition or state to another. See digital TV transition and slide transition.

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