The period in the cell cycle during which the nuclear DNA content doubles. See panel on Cell cycle, sphen-,
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Loose definition, due to international disagreement, of microwave band in the 2-3 GHz region.
Abbrev for stimulus and resyonse theory. The stimulus response theory of learning which holds that the basic components of learning are S-R bonds, stimuli and responses which become forged together as learning proceeds.
A trap used in sanitary pipes in which the oudet leg is parallel with the inlet leg.
Abbrev for super VHS. TN for a high-band version of the VHS format, using a Y/C signal. Both con
Abbrev for stress-number of cycles to failure curve. See panel on Fatigue,
Obsolete unit of acoustic absorption: equal to the absorption, considered complete, offered by 1 ft2 of open window to low-frequency reverberant sound waves in an enclosure. Also open window unit.