Copy of `Dorland's Medical Dictionary`

The wordlist doesn't exist anymore, or, the website doesn't exist anymore. On this page you can find a copy of the original information. The information may have been taken offline because it is outdated.

Dorland's Medical Dictionary Category: Health and Medicine > Medical Dictionary Date & country: 31/12/2010, USA Words: 39128

varicella pneumonia
a type of viral pneumonia developing after the skin eruption in varicella (chickenpox) and apparently due to the same virus; symptoms may be severe, with violent cough, hemoptysis, and severe chest pain.

varicella virus vaccine live
a preparation of live, attenuated human herpesvirus 3 (varicella-zoster virus) administered subcutaneously for production of immunity to varicella and herpes zoster.

varicella-zoster immune globulin
(VZIG) a specific immune globulin derived from plasma of human donors with high titers of varicella-zoster antibodies; used for prevention or amelioration of varicella in immunocompromised patients exposed to the disease and in neonates whose mothers develop varicella in the perinatal period.

varicella-zoster virus
former name for human herpesvirus 3; see herpesvirus.

varicelliform
(var″ĭ-sel´ĭ-form) resembling chickenpox (varicella).

Varicellovirus
(var″ĭ-sel´o-vi″rәs) a genus of herpesviruses of the subfamily Alphaherpesvirinae, which infect both humans and animals. The most common species affecting humans is human herpesvirus 3, the cause of chickenpox and herpes zoster.

varices
(var´ĭ-sēz) plural of varix.

variciform
(var-is´ĭ-form) varicose.

varicoblepharon
(var″ĭ-ko-blef´ә-ron) a varicose swelling of the eyelid.

varicocele
(var´ĭ-ko-sēl″) varicosity of the pampiniform plexus of the spermatic cord, forming a scrotal swelling that feels like a “bag of worms.”

varicocelectomy
(var″ĭ-ko-sә-lek´tә-me) excision of a varicocele.

varicography
(var″ĭ-kog´rә-fe) x-ray visualization of varicose veins.

varicomphalus
(var″ĭ-kom´fә-lәs) a varicose tumor of the umbilicus.

varicophlebitis
(var″ĭ-ko-flә-bi´tis) varicose veins with inflammation.

varicose
(var´ĭ-kōs) of the nature of or pertaining to a varix. unnaturally and permanently distended (said of a vein); called also variciform.

varicose aneurysm
one formed by rupture of an aneurysm into a vein.

varicose bronchiectasis
a type similar to cylindrical bronchiectasis but having only localized constrictions, so that it has an irregular, varicose shape.

varicose ulcer
an ulcer on the leg due to varicose veins.

varicose veins
swollen, distended, and knotted veins, usually in the subcutaneous tissues of a lower limb. Varicose veins are caused by difficulties in the return of blood to the heart from the lower limbs, because the blood has to be pushed upwards against the pull of gravity. Problems arise most often when a person stands too long, sits wit...

varicosity
(var″ĭ-kos´ĭ-te) the quality or state of being varicose; called also phlebectasia and venectasia. varix. a varicose vein.

varicotomy
(var″ĭ-kot´ә-me) excision of a varix or of a varicose vein.

varicula
(vә-rik´u-lә) a varix of the conjunctiva.

variegate porphyria
(VP) porphyria variegata.

variety
(vә-ri´ә-te) a taxonomic subcategory of a species.

variola
(vә-ri´o-lә) smallpox. adj., vari´olar, vario´lous, adj. . variola minor a mild form of smallpox having a low fatality rate.

variola virus
the virtually extinct orthopoxvirus that is the etiologic agent of smallpox. No natural infection has occurred since 1977, and no reservoir of the virus now exists.

variolate
(var´e-o-lāt) having the nature or appearance of smallpox.

varioliform
(var″e-o´lĭ-form) varioloid.

varioloid
(vә-ri´o-loid″) resembling smallpox; called also varioliform.

Varivax
(var´ĭ-vaks) a vaccine against the varicella (chickenpox) virus. One dose is given to a child between age 12 months and 12 years; for those 13 years old or older, two doses are given 4 to 8 weeks apart.

varix
(var´iks) an enlarged, tortuous vein, artery, or lymphatic vessel. aneurysmal varix a markedly dilated tortuous vessel; sometimes used to denote a form of arteriovenous aneurysm in which the blood flows directly into a neighboring vein without the intervention of a connecting sac...

varolian
(vә-ro´le-әn) pertaining to the pons.

varus
(var´әs) Latin word meaining bent or twisted inward. It is used to denote a deformity in which the angulation of the part is toward the midline of the body, as in talipes varus.

vas
(vas) pl. va´sa Latin word meaning vessel; a term used in anatomy. adj., va´sal, adj. .

vas aberrans
(vas´ ab-er´anz) a blind tube sometimes connected with the epididymis; a vestigial mesonephric tube. any anomalous or unusual vessel.

vas deferens
(vas´ def´әr-enz) ductus deferens.

vasa brevia
(va´sә brev´e-ә) short gastric arteries.

vasa praevia
(va´sә pre´ve-ә) the presentation, in front of the fetal head during labor, of the blood vessels of the umbilical cord where they enter the placenta.

vasa recta renis
(va´sә rek´tә re´nis) long U-shaped vessels arising from the efferent glomerular arterioles of juxtamedullary nephrons and supplying the renal medulla. Called also arteriolae rectae renis.

vasa vasorum
(va´sә va-sor´әm) the small nutrient arteries and veins in the walls of the larger blood vessels.

vascular
(vas´ku-lәr) pertaining to blood vessels or indicative of a copious blood supply.

vascular atrophy
progressive loss of substance in cells and organs when the blood supply to that organ or tissue becomes reduced below a critical level.

vascular bed
the sum of the blood vessels supplying an organ or region.

vascular dementia
patchy deterioration of intellectual function resulting from damage by a significant cerebrovascular disorder.

vascular endothelial growth factor
(VEGF) vascular permeability factor(VPF) a peptide factor that stimulates the proliferation of cells of the endothelium of blood vessels; it promotes tissue vascularization and is important in blood vessel formation in tumors.

vascular goiter
one due chiefly to dilatation of the blood vessels of the thyroid gland.

vascular headache
a classification for certain types of headaches, based on a proposed etiology involving abnormal functioning of the blood vessels or vascular system of the brain; included are migraine, cluster headache, toxic headache, and headache caused by elevated blood pressure.

vascular leak syndrome
a disorder caused by extravasation of plasma through vessel walls, causing edema in surrounding tissues; the most common cause is a reaction to therapy with interleukin-2.

vascular murmur
one heard over a blood vessel.

vascular nerves
the nerve branches that supply the adventitia of the blood vessels.

vascular nevus
any nevus caused by a vascular malformation.

vascular reflex
vasopressor reflex vasoconstriction with a rise in blood pressure caused by neural stimulation.

vascular resistance
the opposition to blood flow in a vascular bed; the pressure drop across the bed divided by the blood flow, conventionally expressed in peripheral resistance units. Symbol R or R.

vascular ring
a congenital anomaly of the aortic arch and its tributaries, the vessels forming a ring about the trachea and esophagus and causing varying degrees of compression.

vascular syndrome
any syndrome due to occlusion or stenosis of vessels supplying the nervous system.

vascular system
circulatory system.

vascular tumor
angioma. any tumor with a copious blood supply.

vascularity
(vas″ku-lar´ĭ-te) the condition of being vascular.

vascularization
(vas″ku-lәr-ĭ-za´shәn) vasculogenesis. the natural or surgically induced development of vessels in a tissue.

vascularize
(vas´ku-lәr-īz) to supply with vessels.

vasculature
(vas´ku-lә-chәr) circulatory system. any part of the circulatory system. the supply of vessels to a specific region.

vasculitic neuropathy
angiopathic neuropathy.

vasculitis
(vas″ku-li´tis) pl. vasculi´tides inflammation of a blood or lymph vessel; see arteritis, lymphangitis, and phlebitis. Called also angiitis. hypersensitivity vasculitis a subgroup of systemic necrotizing vasculitis including several types of hypersensitivity reactions, such as to dru...

vasculogenesis
(vas″ku-lo-jen´ә-sis) angiogenesis.

vasculogenic impotence
organic impotence resulting from some disorder of penile arteries or veins, usually insufficient blood flow.

vasculopathy
(vas″ku-lop´ә-the) any disorder of the blood vessels; see also angiopathy.

vasectomy
(vә-sek´tә-me) excision of the vas (ductus) deferens, or a portion of it; bilateral vasectomy results in sterility.

vasifactive
(vas″ĭ-fak´tiv) vasoformative.

vasiform
(vas´ĭ-form) resembling a vessel.

vasitis
(vә-si´tis) deferentitis.

vasoactive
(va″zo-) (vas″o-ak´tiv) exerting an effect upon the caliber of blood vessels.

vasoconstriction
(va″zo-) (vas″o-kәn-strik´shәn) decrease in the caliber of blood vessels. adj., vasoconstric´tive, adj. .

vasoconstrictor
(va″zo-) (vas″o-kәn-strik´tәr) causing constriction of the blood vessels. an agent that so acts.

vasoconstrictor center
a nerve center in the medulla oblongata and lower pons that controls contraction of the blood vessels.

vasoconstrictor nerve
a nerve whose stimulation causes contraction of the blood vessels.

vasodepression
(va″zo-) (vas″o-de-presh´әn) decrease in vascular resistance with hypotension.

vasodepressor
(va″zo-) (vas″o-de-pres´әr) causing vasodepression; having the effect of lowering the blood pressure through reduction in peripheral resistance. an agent that so acts.

Vasodilan
(va″zo-di´lan) trademark for preparations of isoxsuprine, a vasodilator used in peripheral vascular and cerebrovascular conditions.

vasodilatation
(va″zo-) (vas″o-dĭ-lә-ta´shәn) vasodilation.

vasodilation
(va″zo-) (vas″o-di-la´shәn) increase in the caliber of blood vessels. a state of increased caliber of blood vessels. Extreme, abnormal vasodilation is called angiectasis. adj., vasodi´lative, adj. .

vasodilator
(va″zo-) (vas″o-di´la-tәr) causing dilation of blood vessels. a nerve or agent that has this effect.

vasodilator center
a nerve center in the medulla oblongata that causes dilation of blood vessels by repressing the activity of the vasoconstrictor center.

vasodilator nerve
a nerve whose stimulation causes dilation of the blood vessels.

vasoepididymography
(va″zo-) (vas″o-ep″ĭ-did″ĭ-mog´rә-fe) radiography of the vas deferens and epididymis after injection of a contrast medium.

vasoepididymostomy
(va″zo-) (vas″o-ep″ĭ-did-ĭ-mos´tә-me) anastomosis of the vas (ductus) deferens and the epididymis.

vasofactive cell
vasoformative cell angioblast (def. 2).

vasoformative
(va″zo-) (vas″o-for´mә-tiv) angiogenic.

vasoganglion
(va″zo-) (vas″o-gang´gle-on) a vascular ganglion or rete.

vasogenic edema
that characterized by increased permeability of capillary endothelial cells; the most common form of cerebral edema.

vasography
(va-zog´rә-fe) angiography. contrast delineation of the vas deferens and seminal vesicles.

vasohypertonic
(va″zo-) (vas″o-hi″pәr-ton´ik) vasoconstrictor (def. 1).

vasohypotonic
(va″zo-) (vas″o-hi″po-ton´ik) vasodilator (def. 1).

vasoinhibitor
(va″zo-) (vas″o-in-hib´ĭ-tәr) an agent that inhibits the action of the vasomotor nerves. adj., vasoinhib´itory, adj. .

vasoligation
(va″zo-) (vas″o-li-ga´shәn) ligation of the vas (ductus) deferens.

vasomotion
(va″zo-) (vas″o-mo´shәn) change in caliber of blood vessels.

vasomotor
(va″zo-) (vas″o-mo´tәr) having an effect on the caliber of blood vessels; see also vasoactive. a vasomotor nerve.

vasomotor centers
nerve centers in the medulla oblongata and lower pons that regulate the caliber of the blood vessels and increase or decrease the heart rate and contractility. Called also cardiovascular control centers. See also vasoconstrictor center and vasodilator center.

vasomotor imbalance
autonomic imbalance.

vasomotor nerve
a nerve involved in controlling the caliber of vessels, whether as a vasodilator or a vasoconstrictor.

vasomotor paralysis
paralysis of vasomotor muscles and walls of blood vessels.