Etymology: L, vas + constrigere, to tighten. a decrease in the diameter of a blood vessel. It plays an important role in the control of blood pressure and the distribution of blood throughout the body. Vasoconstriction is triggered by stimulation of the vasomotor constriction center in the medulla.
Wiktionary(0.00 / 0 votes)Rate this definition: 1  typify(Verb) To embody, exemplify; to represent by an image, form, model, or resemblance. 2  typify(Verb) To portray stereotypically. 3  typify(Verb) To serve as a typical or reference specimen.
stimulus. noun stimÂ·uÂ·lus \Ëstim-yÉ-lÉs\. Tweet. : something that causes something else to happen, develop, or become more active. : something that causes a change or a reaction.timulus. noun stimÂ·uÂ·lus \Ëstim-yÉ-lÉs\. Tweet. : something that causes something else to happen, develop, or become more active. : something that causes a change or a reaction.