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U
UHT (ultrahigh temperature)
Temperatures of 85øC (185øF) and higher as applied to pasteurization or sterilization of milk
in a relatively short time.
UIP Undegraded intake protein. The portion of intake protein escaping breakdown by rumen microorganisms.
USDA United States Department of Agriculture. The branch of the Federal government that is administered by the Secretary
of Agriculture appointed by the President of the United States.
USDA sire summary A summary of milk production records of daughters of sires to aid in the selection of the best
genetic material available for breeding dairy cattle.
USP United States Pharmacopeia. A unit of measurement or potency of biologicals that usually coincides with an
international unit. See IU.
Udder The encased group of mammary glands provided with teats or nipples, as in a cow, ewe, mare, or sow. Also called
bag.
Ultrapasteurization The process of heating milk at ultrahigh temperatures for a sufficient time to kill all pathogenic
microorganisms, a temperature such as 88.3øC. for 1 second.
Ungulate Referring to a hoofed four-legged animal, as a cow.
Unified series eartag A form of unique identification engraved in a metal tag and fixed to the ear of a dairy cow. Each
number is unique with the first two numbers representing the
state code, followed by three letters and four numbers.
Uniform price The price paid producers for market milk when classified pricing is used in a marketwide pool. The
uniform price is an average of class prices weighted by the
quantity of milk in each class. See blend price.
Unique identification A series of nonduplicating numbers such as registration, uniform series eartag or VIP number. These
numbers are cross-referenced with permanent identification
for registered, VIP and other recorded nonregistered
animals. (Also see visible identification.)
Unsaturated fat A fat having one or more double bonds, not completely hydrogenated.
Unthriftiness Lack of vigor, poor growth or development; the quality or state of being unthrifty in animals.
Urea A nonprotein organic nitrogenous compound (NH2CONH2). It is made synthetically by combining ammonia and carbon
dioxide.
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