| meniscectomy | (noun) surgical removal of the meniscus of the knee | - |
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| mitomycin | (noun) a complex of antibiotic substances obtained from a streptomyces bacterium; one form (trade name Mutamycin) shows promise as an anticancer drug | Synonyms: Mutamycin |
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| monosomy | (noun) chromosomal abnormality consisting of the absence of one chromosome from the normal diploid number | - |
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| mycomycin | (noun) a highly unsaturated antibiotic acid obtained from an actinomycete | - |
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| myotomy | (noun) surgical incision or division of a muscle | - |
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| myringectomy | (noun) surgical removal of the eardrum | - |
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| myringotomy | (noun) surgical incision into the eardrum (to relieve pressure or release pus from the middle ear) | - |
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| myxomycete | (noun) a slime mold of the class Myxomycetes | Synonyms: acellular slime mold, plasmodial slime mold, true slime mold |
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| neomycin | (noun) an antibiotic obtained from an actinomycete and used (as a sulphate under the trade name Neobiotic) as an intestinal antiseptic in surgery | Synonyms: fradicin, Neobiotic |
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| nephrectomy | (noun) surgical removal of a kidney | - |
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| nephrotomy | (noun) incision into a kidney (usually to remove a kidney stone) | - |
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| neurectomy | (noun) surgical removal of all or part of a nerve | - |
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| neuroanatomy | (noun) the anatomy of the nervous system | - |
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| oophorectomy | (noun) surgical removal of one or both ovaries | Synonyms: ovariectomy |
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| oophorosalpingectomy | (noun) surgical removal of one or both ovaries and the corresponding Fallopian tubes | - |
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| ophthalmectomy | (noun) surgical removal of an eye | - |
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| orchidectomy | (noun) surgical removal of one or both testicles | Synonyms: orchiectomy |
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| orchiectomy | (noun) surgical removal of one or both testicles | Synonyms: orchidectomy |
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| orchotomy | (noun) surgical incision into the testis to obtain material for analysis (as in cases of abnormally low sperm count) | - |
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| orthomyxovirus | (noun) a group of viruses including those causing influenza | - |
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| osteomyelitis | (noun) an inflammation of bone and bone marrow (usually caused by bacterial infection) | - |
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| osteotomy | (noun) surgical sectioning of bone | - |
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| ostomy | (noun) surgical procedure that creates an artificial opening for the elimination of bodily wastes | - |
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| ovariectomy | (noun) surgical removal of one or both ovaries | Synonyms: oophorectomy |
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| pancreatectomy | (noun) surgical removal of part or all of the pancreas | - |
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| panhysterectomy | (noun) surgical removal of the uterus and the ovaries and oviducts and cervix and related lymph nodes | Synonyms: radical hysterectomy |
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| perineotomy | (noun) surgical incision into the perineum | - |
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| phenacomys | (noun) any of several vole-like terrestrial or arboreal rodents of cold forested regions of Canada and western United States | - |
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| phlebectomy | (noun) surgical removal or all or part of a vein; sometimes done in cases of severe varicose veins | - |
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| phlebotomy | (noun) surgical incision into a vein; used to treat hemochromatosis | Synonyms: venesection |
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| phycomycosis | (noun) any fungal infection caused by fungi of the Phycomycetes group | - |
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| physiognomy | (noun) the human face (`kisser' and `smiler' and `mug' are informal terms for `face' and `phiz' is British) | Synonyms: countenance, kisser, mug, phiz, smiler, visage |
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| pneumonectomy | (noun) surgical removal of a lung (usually to treat lung cancer) | - |
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| poliomyelitis | (noun) an acute viral disease marked by inflammation of nerve cells of the brain stem and spinal cord | Synonyms: acute anterior poliomyelitis, infantile paralysis, polio |
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| polypectomy | (noun) surgical removal of a polyp | - |
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| polysomy | (noun) congenital defect of having one or more extra chromosomes in somatic cells | - |
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| promycelium | (noun) the basidium of various fungi | - |
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| promythium | (noun) A section of text that comes before the story. | - |
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| prostatectomy | (noun) surgical removal of part or all of the prostate gland | - |
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| rhabdomyoma | (noun) benign tumor of striated muscle | - |
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| rhabdomyosarcoma | (noun) a highly malignant neoplasm derived from striated muscle | Synonyms: rhabdosarcoma |
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| rhinotomy | (noun) surgical procedure in which an incision is made in the nose to drain accumulated pus | - |
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| rhizotomy | (noun) surgical procedure in which spinal nerve roots are cut; done (anterior roots) to relieve intractable pain or (posterior roots) to stop severe muscle spasms | - |
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| rhytidectomy | (noun) plastic surgery to remove wrinkles and other signs of aging from your face; an incision is made near the hair line and skin is pulled back and excess tissue is excised | Synonyms: cosmetic surgery, face lift, face lifting, facelift, lift, nip and tuck, rhytidoplasty |
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| roomy | (adjective) (of buildings and rooms) having ample space | Synonyms: spacious |
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| (noun) an associate who shares a room with you | Synonyms: roomie, roommate |
| salpingectomy | (noun) surgical removal of one or both Fallopian tubes | - |
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| sclerotomy | (noun) surgical incision of the sclerotic coat of the eye | - |
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| septectomy | (noun) surgical removal of all or part of a septum (especially the nasal septum or atrial septum) | - |
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| sigmoidectomy | (noun) surgical removal of part or all of the sigmoid colon (usually to remove a malignant tumor) | - |
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| sodomy | (noun) intercourse via the anus, committed by a man with a man or woman | Synonyms: anal intercourse, anal sex, buggery |
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| (noun) sexual activity between a person and an animal | Synonyms: bestiality, zooerastia, zooerasty |
| spectinomycin | (noun) an antibiotic used to treat gonorrhea | - |
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| splenectomy | (noun) surgical removal of the spleen | - |
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| stapedectomy | (noun) surgical removal of the stapes of the middle ear | - |
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| stereochromy | (noun) a process of mural painting in which the pigment is fixed by a series of reactions between the lime, fluosilicic acid, and water glass. | - |
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| strabotomy | (noun) the surgical operation of cutting a muscle or tendon of the eye in order to correct strabismus | - |
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| streptomyces | (noun) aerobic bacteria (some of which produce the antibiotic streptomycin) | - |
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| streptomycin | (noun) an antibiotic produced by the actinomycete Streptomyces griseus and used to treat tuberculosis | - |
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| suprarenalectomy | (noun) surgical removal of one or both adrenal glands | Synonyms: adrenalectomy |
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| sympathectomy | (noun) surgical interruption of a nerve pathway in the sympathetic nervous system | - |
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| taxonomy | (noun) practice of classifying plants and animals according to their presumed natural relationships | - |
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| (noun) (biology) study of the general principles of scientific classification | - |
| (noun) a classification of organisms into groups based on similarities of structure or origin etc | - |
| thoracotomy | (noun) surgical incision into the chest walls opening up the pleural cavity | - |
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| thrombectomy | (noun) surgical removal of a blood clot (thrombus) from a blood vessel | - |
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| thyroidectomy | (noun) surgical removal of the thyroid gland | - |
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| tonsillectomy | (noun) surgical removal of the palatine tonsils; commonly performed along with adenoidectomy | - |
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| toponomy | (noun) the branch of lexicology that studies the place names of a region or a language | Synonyms: toponymy |
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| (noun) the nomenclature of regional anatomy | Synonyms: toponymy |
| tracheostomy | (noun) a surgical operation that creates an opening into the trachea with a tube inserted to provide a passage for air; performed when the pharynx is obstructed by edema or cancer or other causes | Synonyms: tracheotomy |
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| tracheotomy | (noun) a surgical operation that creates an opening into the trachea with a tube inserted to provide a passage for air; performed when the pharynx is obstructed by edema or cancer or other causes | Synonyms: tracheostomy |
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| trichotomy | (noun) being threefold; a classification into three parts or subclasses | - |
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| trisomy | (noun) chrosomal abnormality in which there is one more than the normal number of chromosomes in a cell | - |
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| troponomy | (noun) the place names of a region or a language considered collectively | Synonyms: troponymy |
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| valvotomy | (noun) incision into a stenosed cardiac valve to relieve the obstruction | Synonyms: valvulotomy |
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| valvulotomy | (noun) incision into a stenosed cardiac valve to relieve the obstruction | Synonyms: valvotomy |
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| vancomycin | (noun) an antibiotic (trade name Vancocin) effective against some bacterial infections | Synonyms: Vancocin |
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| vasectomy | (noun) surgical procedure that removes all or part of the vas deferens (usually as a means of sterilization); is sometimes reversible | - |
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| vasotomy | (noun) surgical incision into or division of the vas deferens | Synonyms: vasosection |
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| vasovasostomy | (noun) a surgical procedure that attempts to restore the function of the vas deferens after a vasectomy | - |
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| viomycin | (noun) a basic polypeptide antibiotic (trade name Viocin) administered intramuscularly (along with other drugs) in the treatment of tuberculosis | Synonyms: Viocin |
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| vitrectomy | (noun) a surgical procedure that removes the vitreous humor and replace it with saline solution | - |
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| vulvectomy | (noun) surgical removal of part or all of the vulva | - |
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