Constrictionand
Constrictionand is not a widely recognized term in English-language academic usage. It does not appear as an entry in major dictionaries or encyclopedias, and there is no established definition for it as a standalone concept. In many cases, the string is likely the result of a typographical error, a concatenation of the noun constriction with the conjunction and, or a coined term used only in a specific, limited context.
One plausible interpretation is that it is a misspelling or artifact for constriction, the act or process
Another possible intended phrase is constriction and dilation, which describes opposing adjustments of caliber in tissues
In engineering or physics, constriction describes a reduction in cross-sectional area in a pipe or channel,
Usage notes: If the term appears in a text, review surrounding material to determine the intended meaning;