block

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block

2. a casing housing one or more freely rotating pulleys
3. Pathol
a. interference in the normal physiological functioning of an organ or part
b. See heart block
c. See nerve block
4. Psychol a short interruption of perceptual or thought processes
5. Computing a group of words treated as a unit of data on a tape, disk, etc
6. Athletics short for starting block
7. Cricket a mark made near the popping crease by a batsman to indicate his position in relation to the wicket
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

Block

A large piece of stone, taken from the quarry to the mill for sawing and further working.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Block

 

in engineering:

(1) A unit of a mechanism in the form of a wheel with a groove around its circumference over which a cable or chain is drawn. It is used to change the direction of a tractive force and to obtain a force or velocity advantage; more rarely, to transfer a torque. Depending on their function, blocks are known as guide, balance, runner, and driving (for imparting rotary motion to a shaft) pulleys. In order to achieve a large force or velocity advantage, a lifting mechanism made up of a combination of blocks (a block and tackle) is used.

(2) A subassembly of a machine, consisting of several identical parts, such as a block of cylinders in an internal combustion engine or the spindle block in a multiple-spindle machine.

(3) A stone (concrete or ceramic) of large size (appreciably larger than a brick) used in the construction of buildings and for road surfacing.

N. IA. NIBERG

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

block

[bläk]
(computer science)
A group of information units (such as records, words, characters, or digits) that are transported or considered as a single unit by virtue of their being stored in successive storage locations; for example, a group of logical records constituting a physical record.
The section of a computer memory or storage device that stores such a group of information units. Also known as storage block.
To combine two or more information units into a single unit.
A contiguous group of text characters that is marked for moving, copying, saving, deletion, or some other word-processing operation.
(design engineering)
A metal or wood case enclosing one or more pulleys; has a hook with which it can be attached to an object.
(mining engineering)
A division of a mine, usually bounded by workings but sometimes by survey lines or other arbitrary limits.
In quarrying, a large portion of rock that is removed from the quarry as a solid mass for further processing at a mill.
(petroleum engineering)
The subdivision of a sea area for the licensing of oil and gas exploration and production rights.
(statistics)
In experimental design, a homogeneous aggregation of items under observation, such as a group of contiguous plots of land or all animals in a litter.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

block

block, 6
1. A masonry unit; a concrete block.
2. (Brit.) A walling unit which exceeds in length, width, or height the dimensions specified for a brick.
3. A solid piece of wood or other material.
4. A plank or timber which serves as bridging between joists or the like.
5. In quarrying, the large piece of stone, generally squared, that is taken from the quarry to the mill for sawing, slabbing, and further working.
6. A mechanical
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

block

1. <unit> A unit of data or memory, often, but not exclusively, on a magnetic disk or magnetic tape.

Compare record, sector.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

block

(1) A group of disk or tape records that is stored and transferred as a single unit. On a CD, a block consists of 98 frames of 33 bytes for a total of 3,234 bytes, or 1/75th of a second. See block level.

(2) A group of bits or bytes that is transmitted or processed as a single unit.

(3) A group of text characters that has been marked for moving, copying, saving or other operation.

(4) A rectangular group of pixels that are processed as a unit.

(5) A group of program statements that are treated as a unit based on the results of a comparison.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
Increased success rate with infraclavicular brachial plexus block using a dual-injection technique.
It was observed from previous studies that increasing the concentration of ropivacaine from 0.5% to 0.75% fails to improve the onset or duration of the block, and using 0.25% ropivacaine for subclavian perivascular brachial plexus block requires frequent analgesia and supplementation (6).
Phrenic nerve paralysis is a common adverse event after an interscalene brachial plexus block; it results in respiratory compromise, particularly in patients with pulmonary disease.
Ultrasound guided single injection infraclavicular brachial plexus block using lignocaine alone or administered with dexmedetomidine for pain control in upper limb surgery: A prospective randomized controlled trial.
The purpose of this study was to compare the effects of tramadol - ropivacaine combination on onset, quality, duration of anaesthesia and postoperative analgesia with ropivacaine plain in supraclavicular brachial plexus block for upper limb surgery.
Conclusion: The addition of dexamethasone to 1.5% lignocaine solution in axillary brachial plexus block prolongs the duration of sensory blockade significantly.
Patients were indicated for either general endotracheal anesthesia or regional anesthesia via an interscalene brachial plexus block with or without general anesthesia.
Hematoma block at fracture site is effective method to decrease need for analgesic and also facilitates fracture reduction.12 Similar results are obtained by comparative studies comparing hematoma block with conventional sedation13 and brachial plexus block.14
Due to the high rate of phrenic nerve paralysis with interscalene blockade, the decision was made to attempt bilateral supraclavicular brachial plexus block placement using ultrasound guidance.
The study evaluated the use of perineural dexamethasone for patients receiving an interscalene brachial plexus block with levobupivacaine.