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

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.

stack

(stak)
To build up porcelain in the shape of a tooth in the fabrication of a tooth crown.

stack,

n a set of metal strips that is inserted into ultrasonic and sonic instruments. A stack converts magnetic fields into vibrations that move the tip of the instrument.
References in periodicals archive ?
The objective of this course is to guide design teams--from hardware engineers to layout designers and fabricators--through the process of evaluating and selecting the right laminate for a design, creating PCB stackups that meet the requirements of complex, multilayer boards that work right the first time, within budget, and with reproducible results across multiple fabricators.
Elimination of these decap structures might allow for easier routing of traces within the same area, which could potentially reduce the required number of layers in the PCB stackup.
GUERNSEY, Channel Islands -- Polar Instruments has added a new flex-rigid PCB design option to Speedstack, the industry's best-selling PCB layer stackup design system.
Phase 2 is in the final phases of completion, where a high-complexity circuit card assembly (CCA) was selected using Thermount-based material for board fabrication with four layers of EPT (Ticer resist materials 25 [ohm] and 1k [ohm], and 3M C-Ply) embedded materials, in a 20-layer stackup with multiple impedance control layers.
Therefore, if the user were to desire to use a TV stackup and thickness representative of their product, the entire test fixture would have to be modified to use connectors that accepted the greater card thickness.
Issues of laminate selection, stackup planning and impedance control will be covered in depth to achieve an understanding of the problems and their solutions.
Here we will extend good high-speed design into properly designing the board stackup, vias and power delivery network (PDN).
The basic definition of a transmission line is a signal and its return path, and the return current defines a factor in the stackup of the layers of a high-speed board.
Designed for use with Polar Instruments' industry-leading Speedstack PCB or Speedstack Si printed circuit board (PCB) stackup design and documentation systems, the automated Coupon Generator imports complete stack-up designs directly from Speedstack.
Since signals propagate at different speeds depending on stackup and inner versus outer layer, it is of added benefit to be able to include the travel time in the checking.