Webster's Dictionary, 1913

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Mesologarithm noun [ Meso- + logarithm : confer French mésologarithme .] (Math.) A logarithm of the cosine or cotangent. [ Obsolete] Kepler. Hutton.

Mesometrium noun [ New Latin See Meso- , and Metrium .] (Anat.) The fold of the peritoneum supporting the oviduct.

Mesomycetes noun plural [ New Latin ; meso- + mycetes .] (Botany) One of the three classes into which the fungi are divided in Brefeld's classification. --
Mesomyodian noun (Zoology) A bird having a mesomyodous larynx.

Mesomyodous adjective [ Meso- + Greek ..., ..., a muscle.] (Zoology) Having the intrinsic muscles of the larynx attached to the middle of the semirings.

Meson noun [ New Latin , from Greek me`son middle, neut. of me`sos , adjective , middle.] (Anat.) 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 . B. G. Wilder.

Mesonasal adjective [ Meso- + nasal .] (Anat.) Of or pertaining to the middle portion of the nasal region.

Mesonephric adjective (Anat.) Of or pertaining to the mesonephros; as, the mesonephric , or Wolffian, duct.

Mesonephros noun [ New Latin , from Greek me`sos middle + nefro`s kidney.] (Anat.) The middle one of the three pairs of embryonic renal organs developed in most vertebrates; the Wolffian body.

Mesonotum noun [ New Latin , from Greek me`sos middle + nw^ton the back.] (Zoology) The dorsal portion of the mesothorax of insects.

Mesophlœum noun [ New Latin , from Greek me`sos middle + floio`s bark.] (Botany) The middle bark of a tree; the green layer of bark, usually soon covered by the outer or corky layer, and obliterated.

Mesophryon noun [ New Latin , from Greek meso`fryon .] (Anat.) See Glabella .

Mesophyllum noun [ New Latin , from Greek me`sos middle + fy`llon leaf.] (Botany) The parenchyma of a leaf between the skin of the two surfaces. Gray.

Mesoplast noun [ Meso- + -plast .] (Biol.) The nucleus of a cell; mesoblast. Agassiz.

Mesopodial (mĕs`o*pō"dĭ* a l) adjective (Anat.) Of or pertaining to the mesopodialia or to the parts of the limbs to which they belong.

Mesopodiale noun ; plural Mesopodialia . [ New Latin , from Greek me`sos middle + ..., dim. of poy`s , podo`s , foot.] (Anat.) One of the bones of either the carpus or tarsus.

Mesopodium noun [ New Latin See Mesopodiale .] (Zoology) The middle portion of the foot in the Gastropoda and Pteropoda.

Mesopterygium noun [ New Latin , from Greek me`sos middle + ... a fin.] (Anat.) The middle one of the three principal basal cartilages in the fins of fishes. --
Mesorchium noun [ New Latin , from Greek me`sos middle + ... a testicle.] (Anat.) The fold of peritoneum which attaches the testis to the dorsal wall of the body cavity or scrotal sac.

Mesorectum noun [ Meso- + rectum .] (Anat.) The fold of peritoneum, or mesentery, attached to the rectum. -- Mes`o*rec"tal adjective

Mesorhine adjective [ Meso- + Greek ..., ..., the nose.] (Anat.) Having the nose of medium width; between leptorhine and platyrhine.

Mesosauria noun Same as Mosasauria .

Mesoscapula noun [ Meso- + scapula .] (Anat.) A process from the middle of the scapula in some animals; the spine of the scapula.

Mesoscapular adjective (Anat.) Of or pertaining to the mesoscapula.

Mesoscutum noun [ Meso- + scutum .] (Zoology) The scutum or dorsal plate of the middle thoracic segment of an insect. See Illust. of Butterfly .

Mesoseme adjective [ Meso- + Greek ... sign, mark; confer French mésosème .] (Anat.) Having a medium orbital index; having orbits neither broad nor narrow; between megaseme and microseme.

Mesosiderite noun [ Meso- + siderite .] (Min.) See the Note under Meteorite .

Mesosperm noun [ Meso- + Greek ... seed: confer French mésosperme .] (Botany) A membrane of a seed. See Secundine .

Mesostate noun [ Meso- + Greek ... to make to stand.] (Physiol.) A product of metabolic action.

» Every mesostate is either an anastate or katastate , according as it is formed by an anabolic or katabolic process. See Metabolism .

Mesosternal adjective (Anat.) Of or pertaining to the mesosternum.

Mesosternum noun [ Meso- + sternum .]

1. (Anat.) The middle portion, or body, of the sternum.

2. (Zoology) The ventral piece of the middle segment of the thorax in insects.

Mesotartaric adjective [ Meso- + tartaric .] (Chemistry) Pertaining to, or designating, an acid called also inactive tartaric acid .

Mesotheca noun [ New Latin , from Greek me`sos middle + ... box.] (Zoology) The middle layer of the gonophore in the Hydrozoa.

Mesothelium noun [ New Latin , from Greek me`sos middle + E. epi thelium .] (Biol.) 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 cœlum.

Mesothoracic adjective (Zoology) Of or pertaining to the mesothorax.

Mesothorax noun [ Meso- + thorax : confer French mésothorax .] (Zoology) The middle segment of the thorax in insects. See Illust. of Coleoptera .

Mesothorium noun [ New Latin ; meso- + thorium .] (Chemistry) A radioactive product intermediate between thorium and radiothorium, with a period of 5.5 years.

Mesotrochal adjective [ Meso- + Greek ... anything round, a hoop.] (Zoology) Having the middle of the body surrounded by bands of cilia; -- said of the larvæ of certain marine annelids.

Mesotype noun [ Meso- + - type : confer French mésotype .] (Min.) An old term covering natrolite or soda mesolite , scolecite or lime mesotype , and mesolite or lime-soda mesotype .

Mesovarium noun [ New Latin See Meso- , and Ovary .] (Anat.) The fold of peritoneum connecting the ovary with the wall of the abdominal cavity.

Mesoxalate noun (Chemistry) A salt of mesoxalic acid.

Mesoxalic adjective [ Mes- + oxalic .] (Chemistry) Pertaining to, or designating, an acid, CH 2 O 2 (CO 2 H) 2 , obtained from amido malonic acid.

Mesozoa noun plural [ New Latin See Mesozoic .] (Zoology) A group of very lowly organized, wormlike parasites, including the Dicyemata. They are found in cephalopods. See Dicyemata .

Mesozoic adjective [ Meso- + Greek ... life, from ... to live.] (Geol.) Belonging, or relating, to the secondary or reptilian age, or the era between the Paleozoic and Cenozoic. See Chart of Geology .

Mesozoic noun The Mesozoic age or formation.

Mesprise noun [ Old French mespris , French mépris . See Misprize .]
1. Contempt; scorn. [ Obsolete]

2. [ Perh. for French méprise mistake. Confer Misprision .] Misadventure; ill-success. [ Obsolete] Spenser.

Mesquite (mĕs*kē"ta), Mes*quit" (mĕs*kēt") }, noun [ Spanish mezquite ; said to be a Mexican Indian word.] (Botany) A name for two trees of the southwestern part of North America, the honey mesquite, and screw-pod mesquite.

Honey mesquite . See Algaroba (b) . -- Screw-pod mesquite , a smaller tree ( Prosopis pubescens ), having spiral pods used as fodder and sometimes as food by the Indians. -- Mesquite grass , a rich native grass in Western Texas ( Bouteloua oligostachya , and other species); -- so called from its growing in company with the mesquite tree; -- called also muskit grass , grama grass .

Mesquite bean The pod or seed of the mesquite.