Same as Mesodermal.

Having teeth of moderate size.

The fold of peritoneum connecting the stomach with the dorsal wall of the abdominal cavity; the mesogastrium.

The umbilical region. The mesogaster.

A thin gelatinous tissue separating the ectoderm and endoderm in certain coelenterates.

Having the jaws slightly projecting; between prognathous and orthognathous. See Gnathic index, under Gnathic.

A fold of the peritoneum connecting the liver with the dorsal wall of the abdominal cavity.

An extinct mammal of the Horse family, but not larger than a sheep, and having three toes on each foot.

An instrument of the ancients for finding two mean proportionals between two given lines, required in solving the problem of the duplication of the cube.

Same as Thomsonite.

A zeolitic mineral, grayish white or yellowish, occuring in delicate groups of crystals, also fibrous massive. It is a hydrous silicate of alumina, lime, and soda.

A logarithm of the cosine or cotangent.

The fold of the peritoneum supporting the oviduct.

One of the three classes into which the fungi are divided in Brefeld's classification.

A bird having a mesomyodous larynx.

Having the intrinsic muscles of the larynx attached to the middle of the semirings.

The mesial plane dividing the body of an animal into similar right and left halves. The line in which it meets the dorsal surface has been called the dorsimeson, and the corresponding ventral edge the ventrimeson.

Of or pertaining to the middle portion of the nasal region.

Of or pertaining to the mesonephros; as, the mesonephric, or Wolffian, duct.

The middle one of the three pairs of embryonic renal organs developed in most vertebrates; the Wolffian body.

Of or pertaining to a meson.

The dorsal portion of the mesothorax of insects.

The middle bark of a tree; the green layer of bark, usually soon covered by the outer or corky layer, and obliterated.

See Glabella.

The parenchyma of a leaf between the skin of the two surfaces.

The nucleus of a cell; mesoblast.

Of or pertaining to the mesopodialia or to the parts of the limbs to which they belong.

One of the bones of either the carpus or tarsus.

The middle portion of the foot in the Gastropoda and Pteropoda.

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.

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).

A product of metabolism; a substance produced by metabolic action, as urea.

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.