Wiktionary(0.00 / 0 votes)Rate this definition: 1  isopleth(Noun) A line drawn on a map through all points having the same value of some measurable quantity. 2  isopleth(Noun) thermodynamics A line in a phase diagram indicating the same mole fraction.
(a) General. Socially disadvantaged individuals are those who have been subjected to racial or ethnic prejudice or cultural bias within American society because of their identities as members of groups and without regard to their individual qualities. The social disadvantage must stem from circumstances beyond their control.
(d) Socially disadvantaged group inclusion - (1) General. Representatives of an identifiable group whose members believe that the group has suffered chronic racial or ethnic prejudice or cultural bias may petition SBA to be included as a presumptively socially disadvantaged group under paragraph (b)(1) of this section.