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Miasmology

That department of medical science which treats of miasma.

Miaul

The crying of a cat.

Mica

The name of a group of minerals characterized by highly perfect cleavage, so that they readily separate into very thin leaves, more or less elastic. They differ widely in composition, and vary in color from pale brown or yellow to green or black. The transparent forms are used in lanterns, the doors of stoves, etc., being popularly called isinglass. Formerly called also cat-silver, and glimmer.

Micaceo-calcareous

Partaking of the nature of, or consisting of, mica and lime; -- applied to a mica schist containing carbonate of lime.

Micaceous

Pertaining to, or containing, mica; splitting into laminae or leaves like mica.

Micella

A theoretical aggregation of molecules constituting a structural particle of protoplasm, capable of increase or diminution without change in chemical nature.

Michaelmas

The feast of the archangel Michael, a church festival, celebrated on the 29th of September. Hence, colloquially, autumn.

Miche Mich

To lie hid; to skulk; to act, or carry one's self, sneakingly.

Michelangelo

Michelangelo Buonarroti, renowned Italian painter, sculptor and architect; 1475-1564.

Micher

One who skulks, or keeps out of sight; hence, a truant; an idler; a thief, etc.

Mickey Mick

a person of Irish descent; -- an ethnic slur, offensive and disparaging.

Micmacs

A tribe of Indians inhabiting Nova Scotia and New Brunswick.

Mico

A small South American monkey (Mico melanurus), allied to the marmoset. The name was originally applied to an albino variety.

Micraster

A genus of sea urchins, similar to Spatangus, abounding in the chalk formation; -- from the starlike disposal of the ambulacral furrows.

micro-chemistry microchemistry

The application of chemical tests to minute objects or portions of matter, usually assisted by sensitive instruments; -- distinguished from macro-chemistry.

Micro-geology

The part of geology relating to structure and organisms which require to be studied with a microscope.

Microampere

One of the smaller measures of electrical currents; the millionth part of one amp/re.

Microanalysis

Analysis of the structure of materials from careful observation of photomicrographs.

Microbacteria

In the classification of Cohn, one of the four tribes of Bacteria.

Microbarograph

An instrument for recording minor fluctuations of atmospheric pressure, as opposed to general barometric surges.

microbian microbial

Of, pertaining to, or caused by, microbes; as, microbial growth; the microbian theory; a microbian disease.

Microbicide

Any agent detrimental to, or destructive of, the life of microbes or bacterial organisms.

Microbiology

The branch of biology studying minute organisms, or microbes, such as the bacteria, fungi, viruses, and protozoa.

Microbion Microbe

A microscopic organism; a microorganism; -- particularly applied to bacteria and especially to pathogenic forms; as, the microbe of fowl cholera.

Microcline

A mineral of the feldspar group, like orthoclase or common feldspar in composition, but triclinic in form.

Micrococcal

Of or pertaining to micrococci; caused by micrococci.

Micrococcus

A genus of Spherobacteria, in the form of very small globular or oval cells, forming, by transverse division, filaments, or chains of cells, or in some cases single organisms shaped like dumb-bells (Diplococcus), all without the power of motion. See Illust. of Ascoccus.

microcomputer

A small computer based on a microprocessor; in practise, at any given time in the technology of computer development, a microcomputer will be one that is less powerful than a minicomputer.

Microcosm

A little world; a miniature universe. Hence (so called by Paracelsus), a man, as a supposed epitome of the exterior universe or great world. Opposed to macrocosm.

Microcoulomb

A measure of electrical quantity; the millionth part of one coulomb.

Microcoustic

An instrument for making faint sounds audible, as to a partially deaf person.

Microcrith

The weight of the half hydrogen molecule, or of the hydrogen atom, at one time taken as the standard in comparing the atomic weights of the elements; thus, an atom of oxygen weighs sixteen microcriths. This unit is no longer used, and has been replaced by the Dalton, which is of approximately the same value. See molecular weight and Crith.

Microcrystalline

Crystalline on a fine, or microscopic, scale; consisting of fine crystals; as, the ground mass of certain porphyrics is microcrystalline.

Microcyte

One of the elementary granules found in blood. They are much smaller than an ordinary corpuscle, and are particularly noticeable in disease, as in anaemia.

Microfilm

to photograph and produce images of on microfilm.

Microform

A microscopic form of life; an animal or vegetable organism of microscopic size.

Micrograph

An instrument for executing minute writing or engraving.

Microhm

The millionth part of an ohm.

Microlepidoptera

A tribe of Lepidoptera, including a vast number of minute species, as the plume moth, clothes moth, etc.

Microlestes

An extinct genus of small Triassic mammals, the oldest yet found in European strata.

Micrology

That part of science which treats of microscopic objects, or depends on microscopic observation.

micromercurialism

A form of mercury poisoning resulting from long term exposure to low doses of mercury. The syndrome of micromercurialism involves complex symptoms of stress, fatigue, memory loss, fine tremors, muscular and reflex insufficiency and low blood pressure, caused by accumulation of mercury in the system. A condition of hyperthermia is accompanied by a series of functional changes under the effects of mercury. The combined simultaneous effect of toxic action, temperature and galvanic response infers a cycle of disintegration and change.

Micromere

One of the smaller cells, or blastomeres, resulting from the complete segmentation of a telolecithal ovum.

micrometeorite

A meteorite so small that it drifts down to Earth without becoming intensely heated in the earth's atmosphere.

Micrometer

An instrument, used with a telescope or microscope, for measuring minute distances, or the apparent diameters of objects which subtend minute angles. The measurement given directly is that of the image of the object formed at the focus of the object glass.

Micromyx

A genus of Old World harvest mice.

micron

A measure of length; the thousandth part of one millimeter; the millionth part of a meter.

Micronesian

Of or pertaining to Micronesia, a collective designation of the islands in the western part of the Pacific Ocean, embracing the Marshall and Gilbert groups, the Ladrones, the Carolines, etc.

Micronesians

A dark race inhabiting the Micronesian Islands. They are supposed to be a mixed race, derived from Polynesians and Papuans.

Micronometer

An instrument for noting minute portions of time.

Microorganism

Any microscopic form of life; a form of life too small to be seen by the naked eye; -- particularly applied to bacteria, protozoa, yeasts, and similar organisms, esp. such are supposed to cause infectious diseases.

Micropantograph

A kind of pantograph which produces copies microscopically minute.

Micropegmatite

A rock showing under the microscope the structure of a graphic granite (pegmatite).

microphone

An instrument for converting sounds into electrical signals, for the purpose of recording or amplifying the sounds. It produces its effects in various ways, as for example by the changes of intensity in an electric current, occasioned by the variations in the contact resistance of conducting bodies, especially of imperfect conductors, under the action of acoustic vibrations. Other forms of microphone may use changes in capacitance or other phenomena to transduce the sounds into electrical signals.

microphonic

Of or pertaining to a microphone; serving to intensify weak sounds.

microphonics

The science which treats of the means of increasing the intensity of low or weak sounds, or of the microphone.

microphonous

Serving to augment the intensity of weak sounds; microcoustic.

Microphytal

Pertaining to, or of the nature of, microphytes.

Microphyte

A very minute plant, one of certain unicellular algae, such as the germs of various infectious diseases are believed to be.

Micropyle

An opening in the membranes surrounding the ovum, by which nutrition is assisted and the entrance of the spermatozoa permitted. An opening in the outer coat of a seed, through which the fecundating pollen enters the ovule.

Microscopal

Pertaining to microscopy, or to the use of the microscope.

Microscope

An optical instrument, consisting of a lens, or combination of lenses, for making an enlarged image of an object which is too minute to be viewed by the naked eye.

Microscopically

By the microscope; with minute inspection; in a microscopic manner.

Microscopy

The use of the microscope; investigation with the microscope.

Microseism

A feeble earth tremor not directly perceptible, but detected only by means of specially constructed apparatus.

Microseismograph

A microseismometer; specif., a microseismometer producing a graphic record.

Microseismometer

A seismometer for measuring amplitudes or periods, or both, of microseisms.

Microseme

Having the orbital index relatively small; having the orbits broad transversely; -- opposed to megaseme.

microsome

a tiny granule in the cytoplasm of a cell; it consists of ribosomes bound to fragments of the endoplasmic reticulum and mitochondria.

Microsorium

A genus of tropical usually epiphytic ferns, found from Africa to Asia, and from Polynesia to Australia.

Microspectroscope

A spectroscope arranged for attachment to a microscope, for observation of the spectrum of light from minute portions of any substance.

Microsporangium

A sporangium or conceptacle containing only very minute spores. Cf. Macrosporangium.

Microspore

One of the exceedingly minute spores found in certain flowerless plants, as Selaginella and Isoetes, which bear two kinds of spores, one very much smaller than the other. Cf. Macrospore.

Microsthene

One of a group of mammals having a small size as a typical characteristic. It includes the lower orders, as the Insectivora, Cheiroptera, Rodentia, and Edentata.

Microsthenic

Having a typically small size; of or pertaining to the microsthenes.

Microtasimeter

A tasimeter, especially when arranged for measuring very small extensions. See Tasimeter.

Microtome

An instrument for making very thin sections for microscopical examination.

Microtomist

One who is skilled in or practices microtomy.

Microtomy

The art of using the microtome; investigation carried on with the microtome.

Microvolt

A measure of electro-motive force; the millionth part of one volt.

Microzo0spore

A small motile spore furnished with two vibratile cilia, found in certain green algae.

Microzyme

A microorganism which is supposed to act like a ferment in causing or propagating certain infectious or contagious diseases; a pathogenic bacterial organism.

Micrurus

A genus of snakes including certain of the coral snakes, such as the eastern coral snake (Micrurus fulvius).

micturate

to pass urine through the ureter; to urinate.

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