The middle one of the three principal basal cartilages in the fins of fishes.

The fold of peritoneum which attaches the testis to the dorsal wall of the body cavity or scrotal sac.

The fold of peritoneum, or mesentery, attached to the rectum.

Having the nose of medium width; between leptorhine and platyrhine.

Same as Mosasauria.

A process from the middle of the scapula in some animals; the spine of the scapula.

Of or pertaining to the mesoscapula.

The scutum or dorsal plate of the middle thoracic segment of an insect. See Illust. of Butterfly.

Having a medium orbital index; having orbits neither broad nor narrow; between megaseme and microseme.

See the Note under Meteorite.

A membrane of a seed. See Secundine.

A product of metabolic action.

Of or pertaining to the mesosternum.

Pertaining to, or designating, an acid called also inactive tartaric acid. It is an optically inactive stereoisomer of tartaric acid due to internal compensation of the rotatory activity of the two asymmetric centers; it has a plane of symmetry in the molecule.

The middle layer of the gonophore in the Hydrozoa.

Epithelial mesoderm; a layer of cuboidal epithelium cells, formed from a portion of the mesoderm during the differetiation of the germ layers. It constitutes the boundary of the c/lum.

Of or pertaining to the mesothorax.

The middle segment of the thorax in insects. See Illust. of Coleoptera.

a radioactive isotope of radium (radium-228) with a half-life of 5.8 years. Also called mesothorium-1 or mesothorium I to distinguish it from a subsequent decay product, mesothorium II (actinium-228). It was discovered in 1907 by Otto Hahn as a decay product of thorium (produced by decay of thorium-232). Mesothorium-1 (radium-228) in turn produces actinium-228 (mesothorium-2) as the first product of its radioactive decay, and the actinium-228 in turn decays quickly (half-life of 6 hours) to thorium-228 (which is also called radiothorium; the thorium-228 has a half-life of 1.91 years, shorter than that of the radium-228). It was discovered and named before full recognition of the nature of isotopes of the elements, and was distinguished from other variants of radium by its half-life and mode of production and decay. It was also cheaper to prepare than other short-lived radium isotopes, and was thus sold commercially, for use, e.g. in making watch dials readable in the dark by painting the hands and hour marks with a self-luminous paint containing the radioactive substance; it is therefore often referred to (e.g. in regulatory legislation) as though distinct from radium. It was one of the isotopes believed responsible for radiation-induced diseases observed in industrial workers who painted radium on watch dials in the late 1950's and early 1960's. The primary isotope of radium (radium-226) has a half-life of 1620 years, and these isotopes with shorter half-lives proved difficult to isolate and study for the purpose of finding the cause of such diseases.

Having the middle of the body surrounded by bands of cilia; -- said of the larvae of certain marine annelids.

An old term covering natrolite or soda mesolite, scolecite or lime mesotype, and mesolite or lime-soda mesotype.

The fold of peritoneum connecting the ovary with the wall of the abdominal cavity.

A salt of mesoxalic acid.

Pertaining to, or designating, an acid, CH2O2(CO2H)2, obtained from amido malonic acid.

A group of very lowly organized, wormlike parasites, including the Dicyemata. They are found in cephalopods. See Dicyemata.

The Mesozoic age or formation.

Contempt; scorn.

Aany of several small spiny trees or shrubs of the southwestern part of North America belonging to the genus Prosopis having small flowers in axillary cylindrical spikes followed by large sugar-rich pods, especially the honey mesquite, and screw-pod mesquite.

To supply with a mess.

To make a mess{5} of; to confuse, disorder, or muddle; to muss; to jumble; to disturb.

Something badly botched or muddled.

A messenger.

A messenger.

One who bears a message; the bearer of a verbal or written communication, notice, or invitation, from one person to another, or to a public body; specifically, an office servant who bears messages.

A dog.

A German epic poem on the Messiah, by Klopstock.

The expected king and deliverer of the Hebrews; the Savior; Christ.

The state or office of the Messiah.

Of or relating to the Messiah; as, the Messianic office or character.

The Messiah.

The tenth month of the French republican calendar dating from September 22, 1792. It began June 19, and ended July 18. See Vend/miaire.

Sirs; gentlemen; -- abbreviated to Messrs., which is used as the plural of Mr.

Of or pertaining to Messina, or its inhabitans.

An associate in a mess.

A dwelling house, with the adjacent buildings and curtilage, and the adjoining lands appropriated to the use of the household.

Most.

The offspring of a white person and a quadroon; -- so called in the West Indies.

See Mister, a trade.

See Mestizo.

The offspring of an Indian or a negro and a European or person of European stock.

A kind of brass. See Maslin.

A repetition at the end of a stanza.

p. p. of Mete, to dream.

A transition from one subject to another.

A change or mutation; a change of disease, symptoms, or treatment.

A comprehensive group of insects, including those that undegro a metamorphosis.

An insect which undergoes a metamorphosis.

Of or pertaining to metamorphosis; pertaining to, or involving, change.

Metabolism.

The act or process, by which living tissues or cells take up and convert into their own proper substance the nutritive material brought to them by the blood, or by which they transform their cell protoplasm into simpler substances, which are fitted either for excretion or for some special purpose, as in the manufacture of the digestive enzymes. Hence, metabolism may be either constructive (anabolism), or destructive (catabolism).

To change by a metabolic process. See Metabolism.

Of or pertaining to the lobe of the carapace of crabs covering the posterior branchiae.

Of or pertaining to the metacarpus. A metacarpal bone.

That part of the skeleton of the hand or forefoot between the carpus and phalanges. In man it consists of five bones. See Illust. of Artiodactyla.

The point of intersection of a vertical line through the center of gravity of the fluid displaced by a floating body which is tipped through a small angle from its position of equilibrium, and the inclined line which was vertical through the center of gravity of the body when in equilibrium.

A colorless liquid of an agreeable odor, C6H10O, obtained by distilling a mixture of sugar and lime; -- so called because formerly regarded as a polymeric modification of acetone.

A white, amorphous, insoluble substance regarded as a polymeric variety of chloral.

An error committed in chronology by placing an event after its real time.

The power of changing color at will by the expansion of special pigment cells, under nerve influence, as seen in many reptiles, fishes, etc.

Sulphide of mercury in isometric form and black in color.

A defect in pronouncing the letter m, or a too frequent use of it.

A polymeric modification of acrolein obtained by heating it with caustic potash. It is a crystalline substance having an aromatic odor.

A process projecting backward and downward from the acromion of the scapula of some mammals.

Discoidal by derivation; -- applied especially to the placenta of man and apes, because it is supposed to have been derived from a diffused placenta.

Of or pertaining to the two posterior gastric lobes of the carapace of crabs.

Measurement, especially of coal.

The change of form which one animal species undergoes in a series of successively produced individuals, extending from the one developed from the ovum to the final perfected individual. Hence, metagenesis involves the production of sexual individuals by nonsexual means, either directly or through intervening sexless generations. Opposed to monogenesis. See Alternate generation, under Generation.

Of or pertaining to metagenesis.

Metagenetic.

Cross-billed; -- said of certain birds, as the crossbill.

Anagrammatism.

By or pertaining to metagraphy.

The art or act of rendering the letters of the alphabet of one language into the possible equivalents of another; transliteration.

To cover with metal; as, to metal a ship's bottom; to metal a road.

A hypothetical radical derived from ammonium by the substitution of metallic atoms in place of hydrogen.

Any language that can be used to describe another language or system of symbols.

A form of albumin found in ascitic and certain serous fluids. It is sometimes regarded as a mixture of albumin and mucin.

A white crystalline substance isomeric with, and obtained from, acetic aldehyde by polymerization, and reconvertible into the same.

The continuation of a trope in one word through a succession of significations, or the union of two or more tropes of a different kind in one word.

Exchange; replacement; substitution; metathesis.

Of or pertaining to a metalepsis.

Metaleptic.

Of or pertaining to a metal; of the nature of metal; resembling metal; as, a metallic appearance; a metallic alloy.

See Metallic.

In a metallic manner; by metallic means.

The production and working or manufacture of metals.

Producing metals; yielding metals.

Having the form or structure of a metal.

A substance of variable composition, but resembling a soft, dark-colored metal, used in the bearings of machines for obviating friction, and as a substitute for lubricants.

A worker in metals, or one skilled in metals.

The act or process of metallizing.

To impart metallic properties to; to impregnate with a metal.

A coloring produced by the deposition of some metallic compound; specifically, the prismatic tints produced by depositing a film of peroxide of lead on polished steel by electricity.

The art or process of coloring metals.

A print made by metallography.

Pertaining to, or by means of, metallography.

One who writes on the subject of metals.

The science or art of metals and metal working; also, a treatise on metals.

Having the appearance of a metal.

Metalloid.

An instrument like a pianoforte, but having metal bars instead of strings. An instrument like the xylophone, but having metallic instead of wooden bars.

Metalorganic.

Treatment of disease by applying metallic plates to the surface of the body.

Of or pertaining to metallurgy.

One who works in metals, or prepares them for use; one who is skilled in metallurgy.

The art of working metals, comprehending the whole process of separating them from other matters in the ore, smelting, refining, and parting them; sometimes, in a narrower sense, only the process of extracting metals from their ores.

A worker in metals.

Beyond the scope or province of logic.

Pertaining to, or denoting, any one of a series of compounds of certain metallic elements with organic radicals; as, zinc methyl, sodium ethyl, etc.; now usually organometallic.

Any one of several metameric forms of the same substance, or of different substances having the same composition; as, xylene has three metamers, viz., orthoxylene, metaxylene, and paraxylene; an isomer.