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 The information may have been taken offline because it is outdated.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

thermal cataract
heat cataract.

thermal death point
the lowest temperature at which a broth culture of microorganisms can be heat-killed in a 10-minute exposure time.

thermalgesia
(thur″mәl-je´ze-ә) painful sensation produced by heat.

thermalgia
(thәr-mal´jә) causalgia.

thermanalgesia
(thurm″an-әl-je´ze-ә) thermanesthesia.

thermanesthesia
(thurm″an-es-the´zhә) absence of temperature sense.

thermesthesia
(thurm″es-the´zhә) temperature sense.

thermesthesiometer
(thurm″әs-the″ze-om´ә-tәr) an instrument for measuring sensibility to heat.

thermhyperesthesia
(thurm″hi-pәr-es-the´zhә) thermohyperesthesia.

thermhypesthesia
(thurm″hi-pes-the´zhә) decreased sensibility to high temperatures.

thermic
(thur´mik) pertaining to heat.

thermic fever
sunstroke.

thermistor
(thәr-mis´tәr) a thermometer whose resistance varies with ambient temperature and so is able to measure extremely small temperature changes.

thermocautery
(thur″mo-kaw´tәr-e) cauterization by a heated wire or point.

thermochemistry
(thur″mo-kem´is-tre) the aspect of physical chemistry dealing with temperature changes that accompany chemical reactions.

thermocoagulation
(thur″mo-ko-ag″u-la´shәn) coagulation of tissue with high-frequency currents.

thermocouple
(thur´mo-kup″әl) a pair of dissimilar electric conductors so joined that with the application of heat an electromotive force is established; used for measuring small temperature differences.

thermodiffusion
(thur″mo-dĭ-fu´zhәn) diffusion due to a temperature gradient.

thermodilution
(thur″mo-dĭ-loo´shәn) a method of measuring ventricular blood volume and cardiac output. A series of 3 to 5 injections of a solution of known temperature is followed by calculation by a computerized sensor or thermistor of the average changes in temperature.

thermodilution catheter
a catheter used in thermodilution for introduction of the cold liquid indicator into the cardiovascular system.

thermoduric
(thur″mo-du´rik) able to endure high temperatures.

thermodynamics
(thur″mo-di-nam´iks) the branch of science dealing with heat, work, and energy, their interconversion, and problems related thereto.

thermoexcitory
(thur″mo-ek-si´tә-re) stimulating production of bodily heat.

thermogenesis
(thur″mo-jen´ә-sis) the production of heat, especially within the animal body. adj., thermogenet´ic, thermogen´ic., adj.

thermogram
(thur´mo-gram) a graphic record of temperature variations. the visual record obtained by thermography; called also thermograph.

thermograph
(thur´mo-graf) an instrument for recording temperature variations. thermogram (def. 2). the apparatus used in thermography.

thermography
(thәr-mog´rә-fe) a technique wherein an infrared camera photographically portrays the body's surface temperature, based on self-emanating infrared radiations; used as a diagnostic aid in the detection of breast tumors and the assessment of rheumatic joints; also used in the study of pain. adj., thermog...

thermohyperalgesia
(thur″mo-hi″pәr-al-je´ze-ә) extreme thermalgesia.

thermohyperesthesia
(thur″mo-hi″pәr-es-the´zhә) extreme sensitiveness to heat; called also thermhyperesthesia.

thermoinhibitory
(thur″mo-in-hib´ĭ-tor-e) retarding the generation of bodily heat.

thermolabile
(thur″mo-la´bәl) (-la´bīl) easily affected by heat.

thermolysis
(thәr-mol´ĭ-sis) chemical dissociation by means of heat. dissipation of bodily heat by radiation, evaporation, or other means. adj., thermolyt´ic., adj.

thermomassage
(thur″mo-mә-sahzh´) massage with heat.

thermometer
(thәr-mom´ә-tәr) an instrument for determining temperatures, in principle making use of a substance (such as alcohol or mercury) with a physical property that varies with temperature and is susceptible of measurement on some defined scale.

thermometry
(thәr-mom´ә-tre) measurement of temperature.

thermophile
(thur´mo-fīl) a microorganism that grows best at elevated temperatures. adj., thermophil´ic., adj.

thermophore
(thur´mo-for) a device or apparatus for retaining heat. an instrument for estimating heat sensibility.

thermopile
(thur´mo-pīl) a number of thermocouples in series, used to increase sensitivity to change in temperature or for direct conversion of heat into electric energy.

thermoplacentography
(thur″mo-plas″әn-tog´rә-fe) use of thermography for determination of the site of placental attachment.

thermoreceptor
(thur″mo-re-sep´tәr) a nerve ending sensitive to stimulation by heat.

thermoregulation
(thur″mo-reg″u-la´shәn) heat regulation. thermostasis.

thermoregulatory centers
nerve centers in the hypothalamus that regulate the conservation and dissipation of heat.

thermostabile
(thur″mo-sta´bәl) (-sta´bīl) not affected by heat.

thermostasis
(thur″mo-sta´sis) maintenance of temperature, as in warm-blooded animals; called also thermoregulation.

thermostat
(thur´mo-stat) a device interposed in a heating system by which temperature is automatically maintained between certain levels.

thermosystaltic
(thur″mo-sis-tawl´tik) contracting under the stimulus of heat.

thermotaxis
(thur″mo-tak´sis) normal adjustment of bodily temperature. taxis in response to the stimulation of a temperature gradient. adj., thermotac´tic, thermotax´ic., adj.

thermotherapy
(thur″mo-ther´ә-pe) therapeutic use of heat. transurethral microwave thermotherapy(TUMT) delivery of microwave energy to the prostate using an antenna attached to a Foley-type catheter, which is inserted through the urethra. It is used to destroy hyp...

thermotonometer
(thur″mo-to-nom´ә-tәr) an instrument for measuring the amount of muscular contraction produced by heat.

thermotropism
(thәr-mot´ro-piz-әm) tropism in response to an increase in temperature. adj., thermotrop´ic., adj.

theta rhythm
a rhythm on the electroencephalogram consisting of theta waves, seen most often in children.

theta waves
brain waves having a frequency of 4 to 7 per second, occurring mainly in children but also seen in adults under emotional stress.

Thévenard syndrome
(ta-vә-nahr´) hereditary sensory radicular neuropathy.

thiabendazole
(thi″ә-ben´dә-zōl) a broad-spectrum anthelmintic used in the treatment of cutaneous larva migrans, visceral larva migrans, strongyloidiasis, and trichinosis.

thiaminase
(thi-am´ĭ-nās) an enzyme that catalyzes the splitting of thiamine into a pyrimidine and a thiazole derivative.

thiamine
(thi´ә-min) vitamin B1.

thiamylal
(thi-am´ĭ-lal) an ultrashort-acting thiobarbiturate used as an intravenous anesthetic.

thiazide
(thi´ә-zīd) any of a group of benzothiadiazinesulfonamide derivatives, typified by chlorothiazide; their primary medicinal use is as diuretics. See thiazide diuretics.

Thibierge-Weissenbach syndrome
(te-be-erzh´ vīs´әn-bahk) calcinosis.

thick-split graft
a skin graft consisting of the epidermis and about two thirds of the dermis.

Thiele syndrome
(thēl) tenderness and pain in the region of the lower portion of the sacrum and coccyx, or in contiguous soft tissues and muscles.

Thiemann disease
(te´mahn) Thiemann syndrome familial avascular necrosis of the phalangeal epiphysis, beginning in childhood or adolescence and resulting in deformity of the interphalangeal joints; called also familial osteoarthropathy of fingers. Similar lesions may occur in the great toes and first tarsometatarsal joints, in whic...

thiemia
(thi-e´me-ә) sulfur in the blood.

Thiersch graft
Ollier-Thiersch graft.

Thiersch operation
removal of thin split-thickness skin grafts by means of a razor, skin-graft cutting knife, or a dermatome.

thiethylperazine
(thi-eth″әl-par´ә-zēn) a phenothiazine derivative with antihistaminic effects, used in the form of the malate and maleate salts as an antiemetic and antinauseant, particularly to treat nausea and vomiting associated with surgery, chemotherapy, radiation therapy, or toxins; administered orally, rec...

thigh
(thi) the portion of the lower limb above the knee; called also femur.

thigh bone
femur.

thigmesthesia
(thig″mes-the´zhә) touch.

thigmotaxis
(thig″mo-tak´sis) taxis in response to contact. adj., thigmotac´tic, thigmotax´ic., adj.

thigmotropism
(thig-mot´ro-piz-әm) tropism in response to the stimulus of contact. adj., thigmotrop´ic., adj.

thimerosal
(thi-mer´o-sәl) a mercury-containing compound used as a topical antifungal and antibacterial agent.

thin tubule
part of the renal tubule where the walls are especially thin, extending from the proximal straight tubule to the distal straight tubule.

thin-layer chromatography
that in which the stationary phase is a thin layer of an adsorbent such as silica gel coated on a flat plate. It is otherwise similar to paper chromatography.

thinking
(thingk´ing) idea-centered mental activity as opposed to emotional activity; the flow of ideas, symbols, and associations that brings forth concepts and reasons. autistic thinking self-absorption; preoccupation with inner thoughts, daydreams, fantasies, delusions, drives, and person...

thiobarbiturate
(thi″o-bahr-bit´u-rāt) any of a group of compounds chemically related to barbiturates and with barbituratelike effects.

thiobarbituric acid
(thi″o-bahr″bĭ-tu´rik) a compound that differs from barbituric acid only by the presence of a sulfur atom instead of an oxygen atom at the number 2 carbon; it is the parent compound of a class of drugs, the thiobarbiturates.

thiocyanate test
see ferric chloride test and Solera test.

thioguanine
(thi″o-gwah´nēn) a guanine analogue in which sulfur replaces the oxygen atom of guanine; used as an antineoplastic agent almost exclusively in the treatment of acute myelogenous leukemia and acute lymphoblastic leukemia. Called also 6-thioguanine and 6-TG.

thiol
(thi´ol) sulfhydryl. any organic compound containing the —SH group bound to carbon.

thionine
(thi´o-nēn) a dark-green powder, purple in solution, used as a metachromatic stain in microscopy.

thiopental
(thi″o-pen´tal) an ultrashort-acting barbiturate, used in the form of the sodium salt as an intravenous anesthetic, to control convulsions produced during inhalation anesthesia, and in psychiatry for narcoanalysis.

thioridazine
(thi″o-rid´ә-zēn) a phenothiazine used orally in the form of the base or the hydrochloride salt as an antipsychotic agent and sedative.

thiotepa
(thi″o-tep´ә) a cytotoxic alkylating agent used as an antineoplastic agent in the treatment of cancer of the breast, ovary, or bladder, pericardial or pleural effusions secondary to malignancy, and Hodgkin disease; used by intracavitary, intratumor, intravesical, or intravenous administration.

thiothixene
(thi″o-thik´sēn) an antipsychotic agent that is a thioxanthene derivative; administered orally or intramuscularly as the base or the hydrochloride salt.

thioxanthene
(thi″o-zan´thēn) a three-ring compound structurally related to phenothiazine. any of a class of structurally related antipsychotic agents, including thiothixene.

third degree heart block
the complete form of heart block, in which no impulses are conducted; often used specifically for third degree atrioventricular block. Called also complete heart block.

third molars
the third molar teeth (wisdom teeth).

third occipital nerve
origin, medial branch of posterior ramus of C3; distribution, skin of upper part of back of neck and head; modality, general sensory.

third stage of labor
see labor.

third ventricle of brain
third cerebral ventricle a narrow cleft within the diencephalon, below the corpus callosum and between the two thalami.

third-degree burn
a burn that destroys both the epidermis and the dermis, and often extends into the subcutaneous tissue.

thirst
(thurst) a sensation, often referred to the mouth and throat, associated with a craving for drink; ordinarily interpreted as a desire for water.

thirst center
a group of cells in the lateral hypothalamus that when stimulated cause a sensation of thirst.

thixotropism
(thik-sot´ro-piz-әm) thixotropy.

thixotropy
(thik-sot´rә-pe) the property of certain gels of becoming fluid when shaken or otherwise agitated and then becoming semisolid again at rest.

Thogoto virus
a species of tick-borne orthomyxoviruses that infect humans, cattle, and sheep in Africa. Human infection results in sometimes severe encephalitis and optic neuritis.

Thogoto-like viruses
a genus of tick-borne viruses of the family Orthomyxoviridae that cause infection in vertebrates in Africa, Europe, and Asia.

Thomas sign
the flexion deformity seen in a hip in the Thomas test.

Thomas splint
two iron rods joined at the upper end by an oval iron ring or half-ring, and bent at the lower end to form a W shape; used to give support to the lower limb and remove the weight of the body from the knee joint by transferring it to the pelvis.