pitch

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pitch

 [pich]
1. a dark, more or less viscous residue from distillation of tar and other substances.
2. any of various bituminous substances such as natural asphalt.
3. a resin from the sap of some coniferous trees.
4. the quality of sound dependent on the frequency of vibration of the waves producing it.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

pitch

(pich),
A resinous substance obtained from tar after the volatile substances have been expelled by boiling.
Synonym(s): pix
[L. pix]
Farlex Partner Medical Dictionary © Farlex 2012

pitch

(pich)
Auditory perception of tone on a scale ranging from low to high, based on the frequency of vibration of the object emitting the tone. For the human voice, pitch relates to frequency of vibration of the vocal folds.
See: voice, frequency
[L. pix]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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References in periodicals archive ?
To obtain carbon materials or carbon/carbon composites with coal tar pitch as the matrix precursor, it is necessary to perform the deep processing of coal tar pitch [7, 8].
Coal tar pitch is a complex mixture of the residue from the distillation of high temperature coal tar with an approximate softening point of 90 to 180 degree C.
Coal tar pitch 70LQI (by DEZA, a.s.) was used for the modification.
[ClickPress, Thu May 30 2019] This MRRSE study offers a ten-year analysis and forecast for the global Coal Tar Pitch Market between 2018 and 2028.
In this report, are presented laboratory-scale investigations of (i) the solid component called synthetic coking coal, SCC that is prepared by mixing selected carbonaceous wastes with a coal tar pitch and (ii) composite mixtures of SCC with a typical coking coal blend (CB) used in the stamp charging method of coke manufacturing in Poland.
Coal tar pitch is an important component in the formulation of coal tar primer, coal tar enamel and other coal tar pipe coatings.
Around 1910 the first type of antioxidants were discovered, mainly naturally existing materials like creosote, asphalt and coal tar pitch. These were used until roughly 1925 when phenol, cresol, hydroquinone and aniline were used as antioxidants.
Summary: The MRRSE report on Coal Tar Pitch carefully analyses the market at a global and regional level through market segmentation on the basis of key parameters, such as form, grade and application.
Asphalt is one concern, as it contains coal tar pitch, a recognized human carcinogen, as well as polycyclic aromatic hydrocarbons (PAHs) including benzo[a]pyrene, another carcinogen.
Hot asphalt kettles, or even worse, coal tar pitch kettles, often send building inhabitants into the streets and sometimes to the hospital because of fumes.
[USPRwire, Thu Mar 14 2019] Market Research Reports Search Engine (MRRSE) has recently updated its massive report catalogue by adding a fresh study titled " Coal Tar Pitch Market Projected to Reach a CAGR of 5.4% during the forecast period till 2028 ".