compaction

[kom-pak´shun]

a complication of labor in twin births in which there is simultaneous full engagement of the leading fetal poles of both twins, so that the true pelvic cavity is filled and further descent is prevented.

com·pac·tion

(kom-pak'shŭn),

The process following the third cleavage division of the zygote during which the blastomeres maximize their contact with each other by polarization and adhesion, forming a compact ball that is held together by tight junctions; compaction segregates the inner cells of the blastocyst that form the embryo from the outer cells that form the fetal part of the placenta.

[L. compactio, fr. com-pingo, pp. com-pactus, to press together]

Farlex Partner Medical Dictionary © Farlex 2012

com·pac·tion

(kŏm-pakshŭn)

Act of compression or squeezing together.

[L. compactio, fr. com-pingo, pp. com-pactus, to press together]

Medical Dictionary for the Dental Professions © Farlex 2012

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References in periodicals archive

The sandstones are modified by mechanical compaction, cementation (quartz overgrowth, calcite, dolomite and iron minerals).Glauconite is also present.

Diagenetic studies of the Cretaceous turbidities, Sulaiman Range, Pakistan: Implications for reservoir quality

According to the compaction test, the optimum moisture content and maximum dry density are 13.0% and 1.954 g/cm3, respectively.

Measurement of Degree of Compaction of Fine-Grained Soil Subgrade Using Light Dynamic Penetrometer

Section 3 delineates the principles and composition of the real-time compaction quality supervising system.

Research on Real-Time Supervisory System for Compaction Quality in Face Rockfill Dam Engineering

The compaction tool-set used in powder metallurgy consists of a die (cavity that holds the powder) and a punch (male part corresponding to the cavity) that delivers the compaction pressure.

Fabrication of crystalline articles of aromatic polycarbonate by hot powder-compaction

Columns (depth 240 mm, diameter 70 mm) were uniformly packed to obtain soil bulk densities of 1.20 g cm-3 as un-compaction (D1.2) and 1.58 g cm-3 as compaction (D1.58).

Quantifying Root Deformation Caused by Soil Radial Pressure: A Case Study with Vetiver Grass (Vetiveria zizanioides)

Product-wise, the market is segmented into heavy compaction machines and light compaction machines.

Compaction Machines Market Projected to be Worth US$ 6,310.7 Mn by 2025

"The previously contracted firm conducted rapid impact compaction at the site of the school," he tells Construction Week.

Site visit: Sobha Hartland, Dubai

After 24 h, the wet soil was then poured in the container in layers (three layers of 2.66 cm thickness) to obtain a uniform compaction through the depth.

Evaluation of load support capacity of remoulded fine and coarse textured soils as affected by wetting and drying cycles

In this study, we compared commercial thinning treatments (whole-tree yarding into landings for sawlog and biomass harvest) with mastication treatments to measure the effects on soil compaction at the stand level.

Thinning treatments had minimal effect on soil compaction in mixed-conifer plantations

Thirteen States participated in the study, Accelerated Implementation of Intelligent Compaction Technology for Embankment Subgrade Soils, Aggregate Base, and Asphalt Pavement Materials.

Intelligent compaction (TechBrief)

Trench Grader compactors make it possible to achieve a higher level of compaction and reach deeper into the soil.

Trench Grader