Copy of `Dorland's Medical Dictionary`

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

Taylor splint
a horizontal pelvic band and long lateral posterior bars; used to apply traction to the lower limb.

tazarotene
(tә-zar´o-tēn) a retinoidprodrug used topically in treatment of acne vulgaris and psoriasis.

tazobactam
(taz″o-bak´tam) a β-lactamase inhibitor having antibacterial actions and uses similar to those of sulbactam; used as the sodium salt.

Tb
terbium.

tb
tuberculosis; tubercle bacillus.

Tc
technetium.

TCA cycle
tricarboxylic acid cycle the cyclic metabolic mechanism by which the complete oxidation of the acetyl portion of acetyl-coenzyme A is effected; the process is the chief source of mammalian energy, during which carbon chains of sugars, fatty acids, and amino acids are metabolized to yield carbon dioxide, water, and high-ene...

TCD
transcranial Doppler, a type of Doppler ultrasonic flowmeter.

TcPO2
transcutaneous oxygen pressure.

Td
tetanus and diphtheria toxoids, adult type; see diphtheria toxoid.

Tdap vaccine
diphtheria and reduced tetanus toxoids and acellular pertussis vaccine; see diphtheria and tetanus toxoids and pertussis vaccine.

TDTH
cells activated T cells producing lymphokines mediating the delayed-type hypersensitivity reaction; most are in the population exhibiting the same surface markers as helper cells.

Te
tellurium.

tea
(te) the dried leaves of Thea chinensis, containing caffeine and tannic acid, or a decoction thereof. any decoction or infusion.

tea tree oil
an essential oil obtained by steam distillation from the leaves and branch tips of Melaleuca alternifolia, having bacteriostatic and weak antiviral and antimycotic properties, used topically for skin infections; it is also used internally and externally in folk medicine for a variety of indications.

teacher's nodes
teacher's nodules vocal cord nodules.

Teale amputation
Teale operation amputation with preservation of a long rectangular flap of muscle and integument on one side of the limb and a short rectangular flap on the other.

tear duct
lacrimal duct.

tears
(tērz) the watery, slightly alkaline and saline secretion of the lacrimal glands that moistens the conjunctiva. See also lacrimal apparatus. crocodile tears see syndrome of crocodile tears.

tease
(tēz) to pull apart gently with fine needles to permit microscopic examination.

teaspoon
(te´spldbomacn) a household unit of volume or capacity approximately equal to 5 milliliters.

teat
(tēt) nipple (def. 1).

technetium
(Tc) (tek-ne´she-әm) a chemical element, atomic number 43, atomic weight 99. technetium 99m the most frequently used radioisotope in nuclear medicine, a gamma emitter having a half-life of 6.01 hours.

technician
(tek-nish´әn) a person skilled in the performance of the technical or procedural aspects of a health care profession; the minimum preparation for this role is generally an associate degree. The technician carries out the routine work of the profession under the supervision of a physician, therapist, technolo...

technique
(tek-nēk´) a maneuver, method, or procedure.

technologist
(tek-nol´ә-jist) a person skilled in the theory and practice of a technical profession. In several allied health fields, technologist is the highest professional rank. Generally, the minimum preparation for this role is a baccalaureate degree. In addition to routine work, the technologist is involved in prob...

technology
(tek-nol´ә-je) scientific knowledge; the sum of the study of a given technique. assisted reproductive technology(ART) any procedure that involves manipulation of eggs or sperm to establish pregnancy in treatment of infertility, such as in vitro fertilization, gamet...

tectorial
(tek-tor´e-әl) of the nature of a roof or covering.

tectorium
(tek-tor´e-әm) Corti membrane.

tectospinal
(tek″to-spi´nәl) extending from the tectum of the midbrain to the spinal cord.

tectum
(tek´tәm) a rooflike structure. tectum of mesencephalon , tectum of midbrain the posterior part of the tegmentum mesencephali.

TED
threshold erythema dose.

teeth
(tēth) plural of tooth.

teething
(tēth´ing) eruption of the teeth through the gums of infants. The average child cuts the first tooth between the sixth and ninth months. The full set of 20 baby teeth erupts gradually over a period up to about 30 months, with the customary pattern being the arrival of two teeth at a time, one on each side of ...

Teflon
(tef´lon) trademark for tetrafluoroethylene fluorocarbon polymers; used as a surgical implant material in many prostheses. Called also polytef.

tegmen
(teg´mәn) Latin word meaning a covering structure or roof; a term used in anatomy. tegmen tympani the thin layer of bone that forms the roof of the tympanic cavity, separating it from the cranial cavity.

tegmental cells
cells that cover any delicate structure.

tegmental mesencephalic paralysis
Benedikt syndrome.

tegmental radiation
fibers radiating laterally from the nucleus ruber.

tegmental syndrome
Benedikt syndrome.

tegmentum
(tәg-men´tәm) Latin word meaning a covering. It is often used alone to refer to the tegmentum mesencephali. adj., tegmen´tal., adj. tegmentum mesencephali , tegmentum of mesencephalon the posterior part of the mesencephalon, formed by continuation of ...

Tegretol
(teg´rә-tol) trademark for a preparation of carbamazepine, an anticonvulsant.

Teichmann test
(for blood) the suspected liquid is put under a coverglass with a crystal of sodium chloride and a little glacial acetic acid; heat carefully without boiling and then cool. If blood is present, rhombic crystals of hemin will appear.

teichoic acids
(ti-ko´ik) antigenic polymers of glycerol or ribitol phosphates found attached to the cell walls or in intracellular association with membranes of gram-positive bacteria; they determine group specificity of some species, such as staphylococci.

teichopsia
(ti-kop´se-ә) scintillating scotoma; the sensation of a luminous appearance before the eyes, with a zigzag, wall-like outline.

teicoplanin
(ti-ko-pla´nin) a glycopeptide antibiotic produced by the bacterium Actinoplanes teichomyceticus, used as a less toxic alternative to vancomycin in the treatment of moderate to severe infections caused by gram-positive bacteria where other antibiotics can not be used.

tela
(te´lә) Latin word for a thin weblike structure or tissue; used in naming various anatomic structures. tela elastica elastic tissue. tela subcutanea subcutaneous tissue.

telalgia
(tә-lal´jә) referred pain.

telangiectasia
(tә-lan″je-әk-ta´zhә) a vascular lesion daused by dilation of a group of small blood vessels to form a small, discolored lesion on the skin. Superficial telangiectasias are sometimes seen in the normal newborn on the nape of the neck (“stork bites”) or on the upper eyelids or up...

telangiectasis
(tә-lan″je-ek´tә-sis) the lesion produced by telangiectasia, which may be present as a coarse or fine red line or as a punctum with radiating limbs (spider). telangiectasia.

telangiosis
(tә-lan″je-o´sis) any disease of the capillaries.

Teldrin HBP
(tel´drin) trademark for a preparation of chlorpheniramine maleate, an antihistamine.

telecanthus
(tel″ә-kan´thәs) abnormally increased distance between the medial canthi of the eyelids.

telecardiography
(tel″ә-kahr″de-og´rә-fe) the recording of an electrocardiogram by transmission of impulses to a site at a distance from the patient.

telecardiophone
(tel″ә-kahr´de-o-fōn) an apparatus for making heart sounds audible at a distance from the patient.

teleceptor
(tel´ә-sep″tәr) a sensory nerve terminal that is sensitive to stimuli originating at a distance. Such nerve endings exist in the eyes and ears.

telediagnosis
(tel″ә-di″әg-no´sis) determination of the nature of a disease at a site remote from the patient on the basis of telehealth methods of transmitted data.

telefluoroscopy
(tel″ә-fldbobr-ros´kә-pe) a telehealth technique consisting of electronic transmission of fluoroscopic images.

telegraphic speech
speech consisting of only certain prominent words, without others such as modifiers; it is typical of children around age two but in older persons it is a form of agrammatism.

telehealth
(tel´ә-helth) the use of electronic information and technology to support long-distance clinical health care, professional health-related education, public health, or health administration.

telekinesis
(tel″ә-kĭ-ne´sis) movement of an object produced without contact. the ability to produce such movement. adj., telekinet´ic., adj.

telemedicine
(tel″ә-med´ĭ-sin) a branch of telehealth consisting of provision of consultant services by off-site health care professionals to those on the scene; diagnosis and treatment can be done at a great distance through methods such as the videoconference or rapid transmission of electronic data.

telemetry
(tә-lem´ә-tre) the making of measurements at a distance from the subject; usually the measurable evidence of phenomena under investigation is transmitted by radio signals.

telencephalon
(tel″en-sef´ә-lon) one of the two divisions of the prosencephalon, consisting of the cerebrum. the anterior of the two vesicles formed by specialization of the prosencephalon in embryonic development. Called also endbrain. adj., telencephal´ic., adj.

teleneurite
(tel″ә-noor´īt) an end expansion of an axon.

teleneuron
(tel″ә-noor´on) a nerve ending.

teleological
(te″le-ә-log´ĭ-kәl) serving an ultimate purpose in development.

teleopsia
(tel″e-op´se-ә) a visual disturbance in which objects appear to be farther away than they actually are.

teleorganic
(te″le-or-gan´ik) necessary to organic life.

Telepaque
(tel´ә-pāk) trademark for a preparation of iopanoic acid, a radiopaque medium used in cholecystography.

telepathy
(tә-lep´ә-the) the communication of thought through extrasensory perception.

teleradiography
(tel″ә-ra″de-og´rә-fe) a telehealth technique consisting of electronic transmission of radiographic images. radiography with the radiation source about 2 meters from the subject, more nearly securing parallelism of the rays and minimizing distortion.

teleradiology
(tel″ĕ-ra″de-ol´ah-je) radiology done through remote transmission and viewing of images.

telesthesia
(tel″es-the´zhә) extrasensory perception.

teletherapy
(tel″ә-ther´ә-pe) treatment in which the source of the therapeutic agent (such as radiation) is at a distance from the body.

telluric
(tә-lu´rik) pertaining to tellurium. pertaining to or originating from the earth.

tellurium
(Te) (tә-lu´re-әm) a chemical element, atomic number 52, atomic weight 127.60.

telmisartan
(tel″mĭ-sahr´tan) an angiotensin II antagonist used as an antihypertensive, administered orally.

telobranchial bodies
telopharyngeal bodies ultimobranchial bodies.

telocentric
(tel″o-sen´trik) having the centromere at the extreme end of the chromosome, which thus has only one arm.

telodendron
(tel″o-den´dron) any of the fine terminal branches of an axon.

telogen
(tel´o-jәn) the quiescent or resting phase of the hair cycle, following catagen. At this stage the hair has become a club hair and does not grow further.

telogen effluvium
the early, excessive, temporary loss of normal club hairs from normal resting follicles in the scalp as a result of traumatization by some stimulus (such as surgery, starvation diet, childbirth, drugs, traction, high fever, certain diseases, or psychogenic stress) that prematurely precipitates the anagen phase into catage...

telognosis
(tel″og-no´sis) diagnosis based on interpretation of radiographs transmitted by radio or telephonic communication. See also teleradiography.

telolecithal
(tel″o-les´ĭ-thәl) having a medium to large amount of yolk, with the yolk concentrated toward one pole thus called the vegetal pole; characteristic of the eggs of fish, amphibians, birds, and reptiles.

telomerase
(tә-lo´mәr-ās) a DNA polymerase involved in the formation of telomeres and the maintenance of telomere sequences during replication.

telomere
(tel´o-mēr) either of the ends of a eukaryotic chromosome, consisting of many repeats of a short DNA sequence in specific orientation. Telomere functions include protecting the ends of the chromosome, so that chromosomes do not end up joined together, and allowing replication of the extreme ends of the chromo...

telophase
(tel´o-fāz) the final stage of mitosis and meiosis, following metaphase and immediately preceding cytokinesis; the daughter chromatids separate from the kinetochoremicrotubules and the nuclear membrane reforms.

telos
(te´lōs) end, goal, purpose.

Temaril
(tem´ә-ril) trademark for preparations of trimeprazine tartrate, an antihistamine used to relieve itching.

temazepam
(tә-maz´ә-pam) a benzodiazepine used as a sedative and hypnotic in treatment of insomnia; administered orally.

temozolomide
(tem″ә-zo´lә-mīd) a cytotoxic alkylating agent used as an antineoplastic in the treatment of refractory anaplastic astrocytoma, administered orally.

tempeh poisoning
bongkrek poisoning.

temperament
(tem´pәr-ә-mәnt) an inherent, constitutional predisposition to react to stimuli in a certain way; the term is often used synonymously with personality. Compare character.

temperature
(tem´pәr-ә-chәr) the degree of sensible heat or cold, expressed in terms of a specific scale.

temperature scale
one for expressing degree of heat, based on absolute zero as a reference point, or with a certain value arbitrarily assigned to such temperatures as the ice point and boiling point of water.

temperature sense
the ability to recognize differences in temperature; called also thermesthesia.

temperature spots
spots on the skin normally anesthetic to pain and pressure but sensitive respectively to heat and cold.

template
(tem´plәt) a pattern or mold. in genetics, a strand of DNA or RNA that specifies the base sequence of the strand of DNA or RNA to be synthesized in replication or transcription, the newly synthesized strand being complementary to the template. in dentistry, a curved or flat plate used a...

template method
a bleeding time test in which a template with a standard-sized slit in it is laid on the person's forearm and an incision is made with a standard-sized knife.