+manus.+ Hand, as in manual, relating to or performed with the hands. +marrow.+ The soft substance filling the medullary cavities and cancellous extremities of the long bones. +massage.+ A scientific method of manipulating the body by rubbing, pinching, kneading, tapping, etc. +matrix.+ The formative portion of a nail or of a tooth. +measles.+ An acute exanthematous disease. +medullary.+ Relating to the medulla or marrow. +membrane.+ A layer of tissue covering a part or connecting two structures. +mercury. Quicksilver.+ +metastasis.+ A change in the seat of disease. +metatarsalgia.+ Pain in the metatarsus. +metatarsophalangeal.+ Relating to the metatarsal bones and the phalanges. +meter.+ Measure, as in meter, a measure of length, the equivalent of 39.3 inches. +microbe.+ A minute one-celled microorganism. +micrococcus.+ A genus of schizomycetes. +microorganism.+ A minute living body. +miliary.+ Like millet seeds, in size. +molecular.+ Pertaining to molecules. +molecule.+ The smallest possible unit of existence of any substance. +morphine.+ The chief narcotic principle of opium. +mortification.+ Death; gangrene. +mucous.+ Relating to mucous as in mucous membrane. +mucus.+ A clear viscid secretion of a mucous membrane, mucilagenous in character. +mummification.+ Dry gangrene. +myeloma.+ A tumor due to hyperplasia of the bone marrow. +myoma.+ A muscular tumor. +myxoma.+ A tumor of stellate or polyhedral cells in a matrix of mucin. +N+ +naevus (nevus).+ A congenital mark or discolored patch of the skin. +nail (unguis).+ The horny plate covering the distal end of the terminal phalanx of each finger and toe. +naphthalan.+ A gelatinous mixture employed as a protective dressing in burns and in skin diseases. +narcosis.+ Stupor or general anesthesia produced by some narcotic drug. +nascent.+ Beginning; incipient. +necrosis.+ Death of a circumscribed portion of tissue. +neoplasm.+ A new growth; a tumor. +neosalvarsan.+ A modified salvarsan: No. 914. +nephritis.+ Inflammation of the kidney. +nerve.+ A whitish cord made up of nerve fibres. +neuralgia.+ Pain in a nerve. +neurasthenia.+ Nerve exhaustion. +neuritic.+ Relating to neuritis. +neuritis.+ Nerve inflammation. +neuroma.+ Nerve tumor. +neuron.+ Nerve cell, as in neuritis, inflammation of a nerve. +neutralize.+ To render ineffective. +node.+ A knob; a circumscribed swelling. +nostrum.+ A quack remedy. +novocaine.+ A synthetic local anesthetic. +noxious.+ Injurious; harmful. +nucleus.+ The essential part of a typical cell and the controlling centre of its activity. +O+ +obliteration.+ Extinction. +official+ (in pharmacy). Authoritative; standard. +oid.+ Like, as in lymphoid, resembling or like lymph. +oil.+ A liquid of fatty consistency, insoluble in water and inflammable. Examples: camphorated oil, carbolic oil, carron oil, linseed oil, oil of turpentine, sweet oil, sesame oil, tar oil. +ointment.+ A soft, fatty, medicated mixture.