[kuh n-vur-juh ns]
- an act or instance of converging.
- a convergent state or quality.
- the degree or point at which lines, objects, etc., converge.
- Ophthalmology. a coordinated turning of the eyes to bear upon a near point.
- the contraction of a vector field.
- a measure of this.
- Meteorology. a net flow of air into a given region.Compare divergence(def 2).
- Biology. similarity of form or structure caused by environment rather than heredity.
Also con·ver·gen·cy (for defs 1–3).
Origin of convergence
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- Also called: convergency the act, degree, or a point of converging
- concurrence of opinions, results, etc
- maths the property or manner of approaching a finite limit, esp of an infinite seriesconditional convergence
- the combining of different forms of electronic technology, such as data processing and word processing converging into information processing
- Also called: convergent evolution the evolutionary development of a superficial resemblance between unrelated animals that occupy a similar environment, as in the evolution of wings in birds and bats
- meteorol an accumulation of air in a region that has a greater inflow than outflow of air, often giving rise to vertical air currentsSee also Intertropical Convergence Zone
- the turning of the eyes inwards in order to fixate an object nearer than that previously being fixatedCompare divergence (def. 6)
Word Origin and History for reconvergence
Online Etymology Dictionary, © 2010 Douglas Harper
- The process of coming together or the state of having come together toward a common point.
- Such a gathering at a single preganglionic motor neuron of several postganglionic motor neurons.
- The coordinated turning of the eyes inward to focus on an object at close range.
- The adaptive evolution of superficially similar structures, such as the wings of birds and insects, in unrelated species subjected to similar environments.convergent evolution
- The movement of cells from the periphery of the embryo toward the midline during gastrulation.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- Mathematics The property or manner of approaching a limit, such as a point, line, or value.
- Biology The evolution of superficially similar structures in unrelated species as they adapt to similar environments. Examples of convergence are the development of fins independently in both fish and whales and of wings in insects, birds, and bats. Also called convergent evolution Compare divergence.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.