stack

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Drug slang A regional term for marijuana
Imaging A descriptive term for the incomplete filling and parallel spiculation of plical folds seen in radiocontrast studies of the small intestine—which is most striking in the jejunum, given the prominence of plical folds—which corresponds to a thickening of the wall by either intramural haemorrhage or haematoma, related to anticoagulants, blood dyscrasia, trauma, Meckel’s diverticulum, endometriosis, or infiltration of the intestinal wall, as in lymphoma
Sports medicine Body-building noun A large amount of performance-enhancing drugs (anabolic steroids) verb To ingest or inject a large amount of anabolic steroids to increase one’s muscle mass
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

stack

(stăk) [ME. stak]
1. To place objects directly on top of others.
2. To perform a procedure immediately after a preceding one, without interruption or pause.
Medical Dictionary, © 2009 Farlex and Partners

stack

(stak)
To build up porcelain in the shape of a tooth in the fabrication of a tooth crown.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
For MCMs and BGAs, the important elements of the simulation are the dielectric stackup definition and the description of a 3D structure in two dimensions.
But these simple devices were ill-equipped to put precision holes in multiple-material stackups without running at the slowest safe speed and without frequent stoppages to sharpen drill bits.
Always seek approval from the fabricator after estimating impedance stackup solutions.
For an inner layer, sandwiched between a uniform ground layer and a plane with multiple power islands, a logical strategy is to design the stackup with the inner signal layer placed close to the solid ground and far from the split power plane.
Next, the designer must review layer sequence to include symmetrical and asymmetrical layer stackup. Lastly, spacing between layers must be considered to include embedded capacitance and impedance control.
Again, this example was designed for a 0.03[inches] offset stripline stackup of a Teflon-based material ([[Epsilon].sub.r] [approximately equal to] 3).
For instance, during stackup, a fabricator subjects the various layers of a PCB to multiple lamination cycles, where the prepreg and epoxy-glass (or other substrate material) bond under heat and pressure.
All the other information--function of images and image elements, stackup, materials, colors and general instructions--is, frankly, a confusing mess that forces CAM engineers to search for, interpret or even guess designers' intentions.
To combat this problem the design team has had to take into consideration, and therefore need to control, the effects of the board stackup, routing, placement, etc.
Other features include PCB stackup visualization, a bidirectional interface to create, predict and define all materials and configurations of PCB materials; PCB batch card management; and mechanical CAD management.
* Elimination of tolerance stackup or accumulation from the nonfunctional surface.
DUE TO ITS effect on both a PCB's electrical and mechanical performance, a sound PCB stackup strategy is vital to creating a reliable PCB.