| / English Dictionary |
DISPERSION
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
The act of dispersing or diffusing something
Example:
the diffusion of knowledge
Synonyms:
diffusion; dispersal; dispersion; dissemination
Classified under:
Nouns denoting acts or actions
Hypernyms ("dispersion" is a kind of...):
spread; spreading (act of extending over a wider scope or expanse of space or time)
Hyponyms (each of the following is a kind of "dispersion"):
crop-dusting; spraying (the dispersion of fungicides or insecticides or fertilizer on growing crops (often from a low-flying aircraft))
Derivation:
disperse (cause to become widely known)
disperse (to cause to separate and go in different directions)
Sense 2
Meaning:
The spatial or geographic property of being scattered about over a range, area, or volume
Example:
in complementary distribution
Synonyms:
dispersion; distribution
Classified under:
Nouns denoting attributes of people and objects
Hypernyms ("dispersion" is a kind of...):
spacing; spatial arrangement (the property possessed by an array of things that have space between them)
Hyponyms (each of the following is a kind of "dispersion"):
complementary distribution; complementation ((linguistics) a distribution of related speech sounds or forms in such a way that they only appear in different contexts)
diaspora (the dispersion or spreading of something that was originally localized (as a people or language or culture))
diffusion; dissemination (the property of being diffused or dispersed)
innervation (the distribution of nerve fibers to an organ or body region)
scatter; spread (a haphazard distribution in all directions)
Sense 3
Meaning:
Spreading widely or driving off
Synonyms:
dispersion; scattering
Classified under:
Hypernyms ("dispersion" is a kind of...):
spread; spreading (process or result of distributing or extending over a wide expanse of space)
Hyponyms (each of the following is a kind of "dispersion"):
Diaspora (the dispersion of the Jews outside Israel; from the destruction of the temple in Jerusalem in 587-86 BC when they were exiled to Babylonia up to the present time)
dissipation (breaking up and scattering by dispersion)
Derivation:
disperse (move away from each other)
Context examples:
Note 2: A colloidal dispersion is a system in which particles of colloidal dimension (i.e., typically between 1 nm and 1 micrometer) are distributed uniformly throughout a liquid.
(Gel Dosage Form, NCI Thesaurus/CDISC)
Testing the device using a spectrometer or spectrograph for the dispersion of visible light (includes electromagnetic, electron, and acoustic spectroscopy).
(Device Spectroscopy Evaluation Method, Food and Drug Administration)
The concentration of a solute or dispersion above which spontaneous aggregation or precipitation occurs.
(Critical Concentration, NCI Thesaurus)
Epinephrine, a potent vasoconstrictor, is added to the gel to enhance penetration of methotrexate into the tumor tissue and reduce dispersion to the surrounding tissues thereby enhancing the local concentration of methotrexate and increasing its anti-tumor activity.
(Methotrexate-E Therapeutic Implant, NCI Thesaurus)
The solid dispersion of itraconazole in the polymer matrix enhances dissolution of itraconazole in the gastrointestinal tract and increases its bioavailability; this allows for the administration of a much lower dose compared to itraconazole alone.
(Itraconazole Dispersion In Polymer Matrix, NCI Thesaurus)
A semisolid (1) dosage form that contains a gelling agent to provide stiffness to a solution or a colloidal dispersion (2).
(Gel Dosage Form, NCI Thesaurus/CDISC)
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