entrain

entrain

1 [en-treyn]

Origin:
1880–85; en-1 + train

entrainer, noun
Dictionary.com Unabridged

entrain

2 [en-treyn]
verb (used with object)
1.
Chemistry. (of a substance, as a vapor) to carry along (a dissimilar substance, as drops of liquid) during a given process, as evaporation or distillation.
2.
(of a liquid) to trap (bubbles).
3.
Meteorology. to transfer (air) into an organized air current from the surrounding atmosphere (opposed to detrain ).

Origin:
1560–70; < Middle French entrainer, equivalent to en- en-1 + trainer to drag, trail; see train

entrainment, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
entrain1 (ɪnˈtreɪn)
 
vb
to board or put aboard a train
 
en'trainment1
 
n

entrain2 (ɪnˈtreɪn)
 
vb
1.  (of a liquid or gas) to carry along (drops of liquid, bubbles, etc), as in certain distillations
2.  to disperse (air bubbles) through concrete in order to increase its resistance to frost
3.  zoology to adjust (an internal rhythm of an organism) so that it synchronizes with an external cycle, such as that of light and dark
 
en'trainment2
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

entrain
1560s, from Fr. entrainer, from en- away + trainer to drag (see train (n.)). Related: Entrained; entrainment. A word in chemistry; the word meaning to get on a locomotive train is from the 1860s.
Online Etymology Dictionary, © 2010 Douglas Harper
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