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Migration
9 dictionary results for: Migration
Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This
mi·gra·tion       [mahy-grey-shuhn] Pronunciation Key
–noun
1.the process or act of migrating.
2.a migratory movement: preparations for the migration.
3.a number or body of persons or animals migrating together.
4.Chemistry. a movement or change of position of atoms within a molecule.
5.Physics. diffusion (def. 3a).

[Origin: 1605–15; < L migrātīon- (s. of migrātiō). See migrate, -ion]

mi·gra·tion·al, adjective
American Heritage Dictionary - Cite This Source - Share This
mi·gra·tion       (mī-grā'shən)  Pronunciation Key 
n.  
  1. The act or an instance of migrating.
  2. A group migrating together.
  3. Chemistry & Physics
    1. The movement of one atom or more from one position to another within a molecule.
    2. The movement of ions between electrodes during electrolysis.

mi·gra'tion·al adj.
Online Etymology Dictionary - Cite This Source - Share This
migration 
1611, of persons, 1646 of animals, from L. migrationem (nom. migratio), from pp. stem of migrare "to move from one place to another," probably originally *migwros, from PIE *meigw- (cf. Gk. ameibein "to change"), from base *mei- "to change, go, move" (see mutable). Migrate is first attested 1697. That European birds migrate across the seas or to Asia was understood in the Middle Ages, but subsequently forgotten. Dr. Johnson held that swallows slept all winter in the beds of rivers, while the naturalist Morton (1703) stated that they migrated to the moon.

WordNet - Cite This Source - Share This
migration

noun
1. the movement of persons from one country or locality to another 
2. a group of people migrating together (especially in some given time period) 
3. (chemistry) the nonrandom movement of an atom or radical from one place to another within a molecule 
4. the periodic passage of groups of animals (especially birds or fishes) from one region to another for feeding or breeding 

The American Heritage Science Dictionary - Cite This Source - Share This
migration       (mī-grā'shən)  Pronunciation Key 
  1. The seasonal movement of a complete population of animals from one area to another. Migration is usually a response to changes in temperature, food supply, or the amount of daylight, and is often undertaken for the purpose of breeding. Mammals, insects, fish, and birds all migrate. The precise mechanism of navigation during migration is not fully understood, although for birds it is believed that sharp eyesight, sensibility to the Earth's magnetic field, and the positions of the Sun and other stars may play a role.
  2. The movement of one atom or more, or of a double bond, from one position to another within a molecule.
  3. The movement of ions between electrodes during electrolysis.

American Heritage Stedman's Medical Dictionary - Cite This Source - Share This

migration mi·gra·tion (mī-grā'shən)
n.

  1. The moving from place to place, as of disease symptoms.
  2. See diapedesis.
  3. The movement of a tooth or teeth out of normal position.
  4. The movement of one or more atoms from one position to another within a molecule.
  5. The movement of ions between electrodes during electrolysis.

Merriam-Webster's Medical Dictionary - Cite This Source - Share This
Main Entry: mi·gra·tion
Pronunciation: mI-'grA-sh&n
Function: noun
: the act, process, or an instance of migrating <migration ofthe upper front teeth> <migrations of the eye worm through the tissues of the body>

Webster's Revised Unabridged Dictionary - Cite This Source - Share This

Migration

Mi*gra"tion\, n. [L. migratio: cf. F. migration.] The act of migrating.

On-line Medical Dictionary - Cite This Source - Share This

migration

migration: in CancerWEB's On-line Medical Dictionary

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