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 The information may have been taken offline because it is outdated.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

ostium secundum
(os´te-әm sә-kun´dәm) an opening in the upper portion of the membrane dividing the embryonic heart into right and left sides, appearing later than the ostium primum. See also atrial septal defect and congenital heart defect.

ostium tympanicum
(os´te-әm tim-pan´ĭ-kәm) tympanic ostium.

ostium uteri
(os´te-әm u´tәr-i) the external opening of the cervix of the uterus into the vagina.

ostium uterinum tubae
(os´te-әm u-tәr-i´nәm too´be) the uterine end of the fallopian tube; the point where the cavity of the tube becomes continuous with that of the uterus.

ostium vaginae
(os´te-әm vә-ji´ne) the external orifice of the vagina.

ostomate
(os´tә-māt) one who has undergone enterostomy or ureterostomy.

ostomy
(os´tә-me) an operation in which an artificial opening is formed, such as a colostomy or ureterostomy; see also stoma.

Ostrum-Furst syndrome
(os´trәm furst´) congenital synostosis of the neck, platybasia, and Sprengel deformity.

OT
occupational therapy; Old tuberculin.

otalgia
(o-tal´je-ә) earache.

OTC
over the counter; see over the counter medications.

Othello syndrome
(ә-thel´o) delusional belief in the infidelity of the sexual partner, often of sudden onset and usually affecting middle-aged men; it is characterized by repeated accusations, intense searches for evidence, and prolonged interrogation of the partner.

otic
(o´tik) auditory (def. 1).

otic ganglion
a parasympathetic ganglion next to the medial surface of the mandibular division of the trigeminal nerve, just inferior to the foramen ovale. Its postganglionic fibers supply the parotid gland.

otic pit
auditory pit.

otic vesicle
auditory vesicle.

otitis
(o-ti´tis) inflammation of the ear; see also otitis externa, otitis media, and otitis interna. adj., otit´ic., adj. aviation otitis a symptom complex due to difference between atmospheric pressure of the environment and air pressure in the middle ear; called also barotit...

otitis externa
inflammation of the external ear, usually caused by a bacteria or fungus. See also otomycosis.

otitis interna
labyrinthitis.

otitis media
inflammation of the middle ear, seen most often in young children. Subtypes are distinguished by length of time from onset (acute versus chronic) and by type of discharge (serous versus suppurative).

Otobius
(o-to´be-әs) a genus of soft-bodied ticks parasitic in the ears of various animals, including humans.

otocephalus
(o″to-sef´ә-lәs) an individual exhibiting otocephaly.

otocephaly
(o″to-sef´ә-le) a developmental anomaly consisting of absence of the lower jaw with the ears united below the face.

otoconia
(o″to-ko´ne-ә) statoconia.

otocranium
(o″to-kra´ne-әm) the area of the petrous part of the temporal bone surrounding the osseous labyrinth. adj., otocra´nial., adj.

otocyst
(o´to-sist″) the auditory vesicle of the embryo. the organ of hearing in certain animals.

otodynia
(o″to-din´e-ә) earache.

otoencephalitis
(o″to-әn-sef″ә-li´tis) inflammation of brain extending from an inflamed middle ear.

otogenic
(o″to-jen´ik) otogenous.

otogenous
(o-toj´ә-nәs) originating within the ear.

otography
(o-tog´rә-fe) description of the ear.

otolaryngology
(o″to-lar″ing-gol´ә-je) the branch of medicine dealing with disease of the ear, nose, and throat; called also otorhinolaryngology.

otolith
(o´to-lith″) statolith.

otologist
(o-tol´ә-jist) a specialist in otology.

otology
(o-tol´ә-je) the branch of medicine dealing with the ear and its anatomy, physiology, and pathology. adj., otolog´ic., adj.

otomycosis
(o″to-mi-ko´sis) otitis externa caused by a fungal infection; it thrives in warm, moist climates and is encouraged by poor local hygiene and swimming. Symptoms include itching, which may be intense, pain, and a stinging sensation in the external acoustic meatus.

otoneurology
(o″to-ndbobr-rol´ә-je) the branch of otology dealing especially with the parts of the nervous system related to the ear. adj., otoneurolog´ic., adj.

otopharyngeal
(o″to-fә-rin´je-әl) pertaining to the ear and pharynx.

otopharyngeal tube
eustachian tube.

otoplasty
(o´to-plas″te) plastic surgery of the external ear.

otopyorrhea
(o″to-pi″o-re´ә) otorrhea that is purulent.

otorhinolaryngology
(o″to-ri″no-lar″ing-gol´ә-je) otolaryngology.

otorhinology
(o″to-ri-nol´ә-je) the branch of medicine dealing with the ear and nose.

otorrhea
(o″to-re´ә) a discharge from the ear.

otosclerosis
(o″to-sklә-ro´sis) the formation of spongy bone in the capsule of the labyrinth of the ear, often causing the auditory ossicles to become fixed and less able to pass on vibrations when sound enters the ear. If this condition affects the stapes and causes it to become fixed to the oval window, hearing can be seriou...

otoscope
(o´to-skōp″) an instrument for inspecting the ear.

otoscopy
(o-tos´kә-pe) examination of the external acoustic meatus with an otoscope.

otospongiosis
(o″to-spon″je-o´sis) the formation of spongy bone in the bony labyrinth of the ear.

ototoxic
(o´to-tok″sik) having a damaging effect upon the eighth cranial (vestibulocochlear) nerve or on the organs of hearing and balance.

ototoxic hearing loss
hearing loss caused by ingestion of a substance that damages the vestibulocochlear nerve.

ototoxicity
(o″to-tok-sis´ĭ-te) the property of being ototoxic.

Otto pelvis
one in which the acetabulum is depressed, accompanied by protrusion of the femoral head into the pelvis.

OU
abbreviation for Latin o´culus uter´que (each eye).

Ouchterlony test
double diffusion in two dimensions.

ounce
(oz) (ouns) in the apothecaries' system, a unit of weight equal to 1/12 of a pound or 480 grains (31.103 grams; symbol ℥. in the avoirdupois system, a unit of weight equal to 1/16pound (28.3495 grams). fluid ounce in the apothecaries' system, a unit of liquid me...

outbreeding
(out´brēd-ing) the mating of genetically unrelated individuals.

outcome
(out´kum) a patient behavior or attitude that results from the interventions of the health care team.

outer ear
the outermost parts of the ear, including the auricle and the external acoustic meatus down to the tympanic membrane. The auricle collects sound waves and directs them through the external meatus to the tympanic membrane. The membrane then vibrates to send sound waves down the chain of auditory ossicles in the middle ear.

outer table of skull
the outer compact layer of the skull.

outlet
(out´lәt) a means or route of exit or egress. pelvic outlet the inferior opening of the pelvis minor. thoracic outlet the irregular opening at the inferior part of the thorax bounded by the twelfth thoracic vertebra, the twelfth ribs, and the curving ...

outlet syndrome
thoracic outlet syndrome.

outlier
(out´li-әr) an observation so distant from the central mass of the data that it noticeably influences results and must be carefully checked to ensure it is not an error.

outpatient
(out´pa-shәnt) a patient who comes to the hospital, clinic, or dispensary for diagnosis or treatment but is not admitted for an overnight stay.

outpocketing
(out-pok´әt-ing) evagination.

output
(out´poot) the yield or total of anything produced by a functional system; when measuring the output of a patient's body, the volume of urine, drainage from tubes, vomitus, and any other measurable liquid should all be included. See also intake and input. cardiac output the effectiv...

output exposure rate
in radiology, the exposure to radiation at a specified point per unit of time, usually expressed in roentgens per minute.

outwardly rectifying current
current that rectifies so that it passes more easily towards the exterior of a cell.

ova
(o´vә) plural of ovum.

oval window
an oval opening in the inner wall of the middle ear, which is closed by the stapes; called also vestibular window and fenestra vestibuli.

ovalocyte
(o´vә-lo-sīt) elliptocyte.

ovalocytosis
(o-val″o-si-to´sis) elliptocytosis.

ovarialgia
(o-var″e-al´jә) pain in an ovary.

ovarian artery
origin, abdominal aorta; branches, ureteral, tubal; distribution, ureter, ovary, uterine tube.

ovarian cancer
cancer of the ovary, one of the leading causes of cancer-related death in women in the developed world. Although aggressive treatment in the early stages offers the best prognosis, detection before the malignancy reaches an advanced stage is difficult. Signs and symptoms become more apparent as the tumor grows. The first ...

ovarian cycle
that part of a menstrual cycle or estrous cycle involving physiologic changes in the ovary, including development and rupture of the follicle, discharge of the oocyte, and corpus luteum formation and regression. It is divided into the follicular phase and the luteal phase.

ovarian follicle
the oocyte and its encasing cells, at any stage of its development. dominant ovarian follicle the growing ovarian follicle in a given menstrual cycle that matures completely and forms the corpus luteum.

ovarian fossa
a shallow pouch on the posterior surface of the broad ligament of the uterus in which the ovary is located.

ovarian hernia
hernial protrusion of an ovary; called also ovariocele.

ovarian hyperstimulation syndrome
an iatrogenic condition seen in women undergoing ovulation induction, characterized by mild to severe ovarian enlargement with exudation of fluid and protein, leading to ascites, pleural or pericardial effusion, azotemia, oliguria, and thromboembolism.

ovarian ligament
a musculofibrous cord in the broad ligament, joining the ovary to the upper part of the lateral margin of the uterus just below the attachment of the uterine tube.

ovarian pregnancy
ectopic pregnancy in an ovary.

ovarian remnant syndrome
pelvic pain, sometimes cyclic, typically occurring several weeks or months after oophorectomy, usually associated with a pelvic mass, most frequently a corpus luteum cyst, which occasionally leads to unilateral ureteral obstruction. It is due to survival of an ovarian fragment after the operation.

ovarian vein syndrome
obstruction of the ureter, usually on the right side, due to compression by an enlarged or varicose ovarian vein; typically the vein becomes enlarged during pregnancy, the symptoms being those of obstruction or infection of the upper urinary tract.

ovariectomy
(o-var″e-ek´tә-me) oophorectomy.

ovariocele
(o-var´e-o-sēl) ovarian hernia.

ovariocentesis
(o-var″e-o-sen-te´sis) surgical puncture of an ovary or an ovarian cyst.

ovariocyesis
(o-var″e-o-si-e´sis) ovarian pregnancy.

ovariopexy
(o-var″e-o-pek´se) oophoropexy.

ovariorrhexis
(o-var″re-o-rek´sis) rupture of an ovary.

ovariosalpingectomy
(o-var″e-o-sal″pin-jek´tә-me) salpingo-oophorectomy.

ovariostomy
(o-var″e-os´tә-me) incision of an ovary, with drainage; oophorostomy.

ovariotomy
(o-var″e-ot´ә-me) surgical removal of an ovary, or removal of an ovarian tumor.

ovariotubal
(o-var″e-o-too´bәl) tubo-ovarian.

ovaritis
(o″vә-ri´tis) oophoritis.

ovarium
(o-var´e-әm) Latin word meaning ovary; a term used in anatomy.

ovary
(o´vә-re) the female gonad; either of the pair of sex glands in the female in which the oocytes are formed. One is on either side of the uterus, usually near the lateral pelvic wall next to the anterior superior iliac spine. The ovaries have two basic functions: ovulation and the production of hormones (chie...

over the counter drugs
over the counter medications.

over the counter medications
(OTCs) drugs that can be purchased by a lay person without a prescription; these have the potential for initiating drug-drug interactions with prescription drugs and must be taken into consideration anytime a patient is prescribed a new medication. In Canada, a specific subgroup of medications availa...

over-and-over suture
a method in which equal bites of tissue are taken on each side of the wound; it may be either interrupted or continuous. See Plate 47.

overanxious disorder
former name for an anxiety disorder of childhood or adolescence, now subsumed by generalized anxiety disorder.