Menses (men’sez).  Monthly flow from the womb.

Menstrual (men’stru-al).  Pertaining to menstruation.

Menstruum (men’stru-urn).  A solvent.

Metastasis (met-as’tas-is).  The transfer of a diseased process from a
                            primary focus to a distance by the conveyance
                            of the causal agents through the blood vessels
                            or lymph channels, like mumps from face to
                            the scrotum.

Metatarsus (met-ah-tar’-sus).  The bones of the foot—­situated between the
                              (instep) tarsus and toes.

Miasm (mi’asm).  Anything harmful contaminating the air.

Micturition (mik-tu-rish’-un).  The act of passing urine.

Midwife (mid’wif).  A female nurse who attends women in childbirth.

Minim (min’-im).  About a drop.

Mitral valves (mit’ral).  The valves that control the opening from the left
                         auricle to the left ventricle.

Morbid (mor’bid).  Pertaining to disease or diseased parts.

Morbific (mor-bif ’ik).  Producing disease.

Morbus (mor’bus).  Disease.

Mucous Membrane (mu’kus).  A membrane that secretes mucus.

Mortification (mor-tif-ik-a’shun).  See gangrene.

Mucilage (mu-cil’ij).  A solution of gum in water.

Mucus (mu’kus).  A viscid liquid.

Narcotic (nar-kot’-ik).  A drug that produces stupor.

Nausea (naw’sheah).  Sickness at the stomach with an inclination to vomit.

Navel (n-a’vet).  The umbilicus.

Nauseant. (naw’she-ant).  Nauseating; producing nausea.

Necrosis (nek-ro’sis).  The death of cells surrounded by living tissue.

Nephritic (nef-rit’-ik).  Pertaining to nephritis (inflammation of the
                         kidneys).

Nervine (nur’-vin).  Acting upon the nerves.

Neuralgia (nu-ral’-jeah).  Severe pain along a nerve without any
                          demonstrable structural changes in the nerve.

Neurasthenia (nu-ras-then-iah).  A group of symptoms resulting from
                             debility or exhaustion of the nerve centers.

Nocturnal (nok’-tur-nal).  Pertaining to the night.

Node (nod).  A knob.  Protuberance.

Normal (nor’-mal).  Conforming to natural law or order.

Nostalgia (nos-tal’-je-ah).  Homesickness.

Nostrum (nos’trum).  A quack; secret medicine.

Nutritious (nu’trish’us).  Nourishing.

Obtuse (ob-tus’).  Dull.

Obesity (obes’it-e).  An excessive development of fat.

Oedema (e-de’mah).  An infiltration of serum in a part; watery swelling.

Obstetrics (ob-stet’-riks).  Care of women during pregnancy, confinement
                            and after.