any agent that causes a narrowing of an opening of a blood vessel: cold or stress or nicotine or epinephrine or norepinephrine or angiotensin or vasopressin or certain drugs; maintains or increases blood pressure

the degree of hotness or coldness of a body or environment (corresponding to its molecular activity)

having a low or inadequate temperature or feeling a sensation of coldness or having been made cold by e.g. ice or refrigeration

coldness due to a cold environment

the property of being moderately cold

coldness as evidenced by frost

the quality of being at a refreshingly low temperature