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migrations

 [mahy-grey-shuhn]   Origin

mi·gra·tion

   [mahy-grey-shuhn]
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; < Latin migrātīon- (stem of migrātiō). See migrate, -ion

Related forms
mi·gra·tion·al, adjective
non·mi·gra·tion, noun
pre·mi·gra·tion, adjective
re·mi·gra·tion, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Migrations is always a great word to know.
So is bezoar. Does it mean:
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
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Etymonline
Word Origin & History

migration
1610s, of persons, 1640s 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). That
EXPAND
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.
COLLAPSE
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

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.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
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.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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