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uncertainty reduction strategies Passive, active, and interactive ways of increasing accuracy in interpersonal perception.
underwriters   Investment bankers who help companies issue their securities to the public.
unit investment trust  Money invested in a portfolio whose composition is fixed for the life of the fund. Shares in a unit trust are called redeemable trust certificates, and they are sold at a premium above net asset value.
universalism  A cultural orientation that emphasizes treating people as individuals, rather than in terms of the groups (racial, sexual, national, for example) to which they belong
unknown self  That self that contains information not known to either the person himself or herself or to others.
unrepeatability Principle of communication stating that no communication can ever be re-created in quite the same way because circumstances are never the same.
urea nitrogen nitrogenous end product of protein metabolism