compaction

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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]

compaction

/com·pac·tion/ (kom-pak´shun)
1. 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 lesser pelvis is filled and further descent is prevented.
2. in embryology, the process during which blastomeres change their shape and align themselves tightly against each other to form the compact morula.

com·pac·tion

(kŏm-pakshŭn)
Act of compression or squeezing together.
[L. compactio, fr. com-pingo, pp. com-pactus, to press together]

compaction (kompak´shən),

n the act of compacting or the state of being compact.

compaction

packing together as in twin births when both fetuses engage the pelvis at the same time, in prolonged constipation in dogs, and in compaction of endochondral bone as a part of normal bone modeling.
References in periodicals archive ?
Very little is known about the severity and extent of soil compaction.
These stands are still under the lagging effect of initial compaction, when log loads were heavy enough to increase soil compaction relatively deep in the soil profile (Danfors 1974), as suggested in figure 2.
Impact of soil compaction Root Lengh Yield of Corn under Irrigation Condition.
After preparing the soil for the experiments the soil compaction at a depth of 50 mm was found to be 0.
Quantitative evaluation of soil compaction is necessary to determine its severity and to identify suitable mechanical, chemical, or biological methods of intervention for ameliorating or controlling soil compaction.
Computed tomography miniscanner for studying tillage induced soil compaction.
In summary, greater soil compaction (lower macroporosity and higher bulk density) was measured under irrigated than dryland treatments.
IN shrub borders, fork over bare patches between plants to relieve soil compaction, working garden compost or well-rotted manure into the soil as you go.
Chapters come from an architect and discuss everything from field testing soil to understanding layout, design, and soil compaction.
Secondly, the environmental division began several projects to manage erosion and soil compaction.
Bio Solutions has also developed a line of soil amendment products and procedures to target the improvement of poor soil due to fertilizer burn-out or soil compaction.