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
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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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Example sentences
Our talent for unconscious entrainment lies at the core of dance, a confluence
  of movement, rhythm and gestural representation.
Drop back to the next largest particle size to determine the largest particle
  size to be used in the entrainment calculation.
Dust emission and air entrainment data are needed for designing adequate and
  effective control methods.
Entrainment rates are inferred from measurements of air flow through a door or
  window and from room temperature da ta.
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