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Medical Dictionary - Dictionary of Medicine and Human Biology


Medical Dictionary


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millibar (mil′i-bar)
One-thousandth of a bar; 100 newtons/sq m; 0.75006 mm Hg; standard atmospheric pressure is 1013 millibars.

millicurie (mc, mCi) (mil′i-ku′re)
A unit of radioactivity equivalent to 3.7 × 107 disintegrations per second.

milliequivalent (mEq, meq) (mil′i-e-kwiv′a-lent)
One-thousandth equivalent; 10−3 mol divided by valence.

milligram (mg) (mil′i-gram)
One-thousandth of a gram.

millilambert (mil-i-lam′bert)
One thousandth of a lambert; a unit of brightness equal to 0.929 lumen per square foot (roughly, 1 equivalent footcandle).

milliliter (mil′i-le-ter)
One-thousandth of a liter.

millimeter (mm) (mil′i-me-ter)
One-thousandth of a meter.

millimicro-
Prefix formerly used to signify submultiples of one-billionth (10−9); now nano-.

millimicron (mμ) (mil′i-mi-kron)
Former term for nanometer.

millimole (mmol) (mil′i-mol)
One-thousandth of a gram-molecule.

milling-in (mil′ing-in)
Refining the occlusion of teeth by the use of abrasives between their occluding surfaces while the dentures are rubbed together in the mouth or on the articulator.

milliosmole (mil′i-oz-mol)
One-thousandth of an osmole.

millipede (mil′i-ped)
A venomous nonpredaceous arthropod of the order Diplopoda, characterized by two pairs of legs per leg-bearing segment. The venom is purely defensive, oozed or squirted from pores along the body, producing irritation to the skin or severe inflammation if it reaches the eyes. [milli- + L. pes, pedis, foot]

millisecond (ms, msec) (mil′i-sek′ond)
One-thousandth of a second.

millivolt (mV) (mil′i-volt)
One thousandth of a volt.

Millon
Auguste N.E., French chemist, 1812–1867. See M. reaction, M. reagent, M.-Nasse test.

milphosis (mil-fo′sis)
Loss of eyelashes. SYN: madarosis (1) . [G. m.]

milrinone (mil′ri-non)
A xanthine oxidase inhibitor which increases the force of contraction of the heart; used in congestive heart failure; resembles amrinone; cardiotonic.

Milroy
William F., U.S. physician, 1855–1942. See M. disease.

MIM
Abbreviation for Mendelian Inheritance in Man.

mimesis (mi-me′sis, mi-)
1. Hysterical simulation of organic disease. 2. The symptomatic imitation of one organic disease by another. [G. m., imitation, fr. mimeomai, to mimic]

mimetic (mi-met′ik, mi-)
Relating to mimesis. [G. mimetikos, imitative]

mimic (mim′ik)
To imitate or simulate. [G. mimikos, imitating, fr. mimos, a m.]

mimmation (mi-ma′shun)
A form of stammering in which the m-sound is given to various letters. [Ar. mim, the letter m]

min.
Abbreviation for minute.

mind
1. The organ or seat of consciousness and higher functions of the human brain, such as cognition, reasoning, willing, and emotion. 2. The organized totality of all mental processes and psychic activities, with emphasis on the relatedness of the phenomena. [A.S. gemynd] prelogical m. SYN: prelogical thinking. subconscious m. SYN: subliminal self.

mind-reading
SYN: telepathy.

mineral (min′er-al)
Any homogeneous inorganic material usually found in the earth's crust. [L. mineralis, pertaining to mines, fr. mino, to mine]

mineralization (min′er-al-i-za′shun)
The introduction of minerals into a structure, as in the normal m. of bones and teeth or the pathologic m. of tissues, i.e., dystrophic or metastatic calcification.

mineralocoid (min-er-al′o-koyd)
SYN: mineralocorticoid.

mineralocorticoid (min′er-al-o-kor′ti-koyd)
One of the steroids of the adrenal cortex that influences water and electrolyte (particularly sodium and potassium ions) metabolism and balance. SYN: mineralocoid.

mineral oil
A mixture of liquid hydrocarbons obtained from petroleum, used as a vehicle in pharmaceutical preparations; occasionally used as an intestinal lubricant; can interfere with absorption of fat-soluble vitamins. SYN: heavy liquid petrolatum, liquid paraffin, liquid petroleum.

mineralotropic (min-er-al′o-tro′pik)
Concerning the action of or relating to mineralocorticoids.

mini (mi′ne)
A moderate-sized computer that can serve many users in a department, or one dedicated to a complex computational function such as computed tomography or magnetic resonance imaging; smaller and slower than a mainframe, more complex and powerful than a personal computer. [It. miniatura, decoration of manuscripts, fr. L. minium, red lead]

minilaparotomy (min′e-lap-a-rot′o-me)
Technique for sterilization by surgical ligation of the fallopian tubes, performed through a small suprapubic or infraumbilical incision.

minim (m)
1. A fluid measure, 160 of a fluidrachm; in the case of water about one drop. 2. Smallest; least; the smallest of several similar structures. [L. minimus, least]

minimum (min-i-mum)
The smallest amount or lowest limit. [L. smallest, least]

minimyosin (min-e-mi′o-sin)
A protein similar to myosin in having a globular actin-binding domain and a short tail that can bind to membranes but lacking a long α-helical tail; believed to have a role in filopodium extension in the growth cone of neurons.

minithoracotomy
See under thoracotomy.

minocycline (min-o-si′klen)
A substituted naphthacenecarboxamide; an antibacterial drug related to tetracycline.

minor (mi′ner)
Smaller; lesser; denoting the smaller of two similar structures. [L.]

minoxidil (mi-nok′si-dil)
An antihypertensive agent used for treatment of premature hair loss; sometimes used topically on the scalp to increase hair growth.

mint
SYN: Mentha. [G. mintha]

mio-
Less. [G. meion]

miodidymus, miodymus (mi-o-did′i-mus, mi-od′i-mus)
Unequal conjoined twins with the head of the smaller twin joined to the occipital region of the head of the larger twin. See conjoined twins, under twin. [mio- + G. didymos, twin]

miolecithal (mi-o-les′i-thal)
Denoting an egg with little yolk which is uniformly dispersed throughout the egg. [mio- + G. lekithos, egg yolk]

miopragia (mi-o-pra′je-a)
Diminished functional activity in a part. [mio- + G. prasso, to do]

miopus (mi-o′pus)
Unequal conjoined twins with heads united in such a manner that one face is rudimentary. See conjoined twins, under twin. [mio- + ops, eye]

miosis (mi-o′sis)
1. Contraction of the pupil. 2. Incorrect alternative spelling for meiosis. [G. meiosis, a lessening] paralytic m. m. due to paralysis of the dilator muscle of the pupil. spastic m. m. due to spasmodic contraction of the sphincter muscle of the pupil.

miotic (mi-ot′ik)
1. Relating to or characterized by constriction of the pupil. 2. An agent that causes the pupil to constrict so that the pupils are small.

MIP
Abbreviation for maximum intensity projection.

MIP
Abbreviation for macrophage inflammatory protein.

miracidium, pl .miracidia (mi-ra-sid′e-um, -a)
The ciliated first-stage larva of a trematode that emerges from the egg and must penetrate into the tissues of an appropriate intermediate host snail if it is to continue its life cycle; followed by development into a mother sporocyst and by production of a number of offspring of successive larval generations. SEE ALSO: sporocyst (1) . [G. meirakidion, boy]

Mirchamp sign
See under sign.

mire (mer)
One of the test objects in the ophthalmometer; its image (also called a m.), mirrored on the corneal surface, is measured to determine the radii of curvature of the cornea. [L. miror, pp. -atus, to wonder at]

mirex (mi′reks)
Benzene derivative used as insecticide and fire retardant for plastics, rubber, paint, paper, electrical goods; likely carcinogen.

Mirizzi
P.L., 20th century Argentinian physician. See M. syndrome.

mirror (mir′or)
A polished surface reflecting the rays of light reflected from objects in front of it. [Fr. miroir, fr. L. miror, to wonder at] concave m. a spherical reflecting surface that constitutes a segment of the interior of a sphere. convex m. a spherical reflecting surface that constitutes a segment of the exterior of a sphere. head m. a circular concave m. attached to a head band, used to project a beam of light into a cavity, such as the nose or larynx, for purposes of examination and permitting binocular vision. mouth m. a small m. on a handle used to facilitate visualization in the examination of the teeth. van Helmont m. obsolete term for central tendon of diaphragm.

mirror-writing (mir′or-rit-ing)
Writing backward, from right to left, the letters appearing like ordinary writing seen in a mirror. SYN: retrography.

miryachit (mir-yach′it)
A nervous affection observed in Siberia. See jumping disease.

MIS
Abbreviation for müllerian inhibiting substance.

misandry (mis′an-dre)
Aversion to or hatred of men. [G. miseo, to hate, + aner, andros, male]

misanthropy (mis-an′thro-pe)
Aversion to and hatred of human beings. [G. miseo, to hate, + anthropos, man]

miscarriage (mis-kar′ij)
Spontaneous expulsion of the products of pregnancy before the middle of the second trimester. SYN: spontaneous abortion.

miscarry (mis-kar′e)
To have a miscarriage.

miscegenation (mis′e-je-na′shun)
Marriage or interbreeding of individuals of different races. [L. misceo, to mix, + genus, descent, race]

miscible (mis′i-bl)
Capable of being mixed and remaining so after the mixing process ceases. [L. misceo, to mix]

misdiagnosis (mis′di-ag-no′sis)
A wrong or mistaken diagnosis.

misogamy (mi-sog′a-me)
Aversion to marriage. [G. miseo, to hate, + gamos, marriage]

misogyny (mi-soj′i-ne)
Aversion to or hatred of women. [G. miseo, to hate, + gyne, woman]

misopedia, misopedy (mis-o-pe′de-a, -op′e-de)
Aversion to or hatred of children. [G. miseo, to hate, + pais (paid-), child]




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