nonblocking

blocking

[blok-ing]
noun Carpentry.
a number of small pieces of wood for filling interstices, or for spacing, joining, or reinforcing members.

Origin:
1575–85; block + -ing1

nonblocking, adjective, noun
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World English Dictionary
blocking (ˈblɒkɪŋ)
 
n
1.  electronics the interruption of anode current in a valve because of the application of a high negative voltage to the grid
2.  internal congestion in a communication system that prevents the transmission of information

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Etymonline
Word Origin & History

block
"solid piece," c.1300, from O.Fr. bloc "log, block" (13c.), via M.Du. bloc "trunk of a tree" or O.H.G. bloh, both from PIE *bhlugo-, from *bhelg- "a thick plank, beam" (see balk). Slang sense of "head" is from 1630s. The meaning in city block is 1796, from the notion of a "compact
mass" of buildings; slang meaning "fashionable promenade" is 1869. Extended sense of "obstruction" is first recorded 1640s. The verb "to obstruct" is from 1560s.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

block (blŏk)
n.

  1. Interruption, especially obstruction, of a normal physiological function.

  2. Interruption, complete or partial, permanent or temporary, of the passage of a nervous impulse.

  3. Atrioventricular block.

  4. Sudden cessation of speech or a thought process without an immediate observable cause, sometimes considered a consequence of repression.

v. blocked, block·ing, blocks
To arrest passage through; obstruct.
block'age (blŏk'ĭj) n.
The American Heritage® Stedman's Medical Dictionary
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American Heritage
Science Dictionary
block and tackle   (blŏk)  Pronunciation Key 
An arrangement of pulleys and ropes used to reduce the amount of force needed to move heavy loads. One pulley is attached to the load, and rope or chains connect this pulley to a fixed pulley. Each pulley may have multiple grooves or wheels for the rope to pass over numerous times. Pulling the rope or chain slowly draws the load-bearing pulley toward the fixed one with high mechanical advantage.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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