1. (Anat.) (a) Of or pertaining to the middle region of the abdomen, or
of the stomach. (b) Of or pertaining to the mesogaster.
2. (Zoöl.) Of or pertaining to the middle gastric lobe of the carapace
of a crab.
||Mes`o*gas"tri*um (?), n. [NL. See Mesogaster.] (Anat.) (a) The
||umbilical region. (b) The mesogaster.
||Mes`o*glœ"a (?), n. [NL., fr. Gr. me`sos middle + &?; a glutinous
||substance.] (Zoöl.) A thin gelatinous tissue separating the ectoderm
||and endoderm in certain cœlenterates. -- Mes`o*glœ"al (#), a.
Me*sog"na*thous (?), a. [Meso- + Gr. gna`qos jaw.] (Anat.) Having the
jaws slightly projecting; between prognathous and orthognathous. See
Gnathic index, under Gnathic.
||Mes`o*he"par (?), n. [NL. See Meso-, and Hepar.] (Anat.) A fold of
||the peritoneum connecting the liver with the dorsal wall of the
||abdominal cavity.
||Mes`o*hip"pus (?), n. [NL., fr. Gr. me`sos middle + &?; a horse.]
||(Paleon.) An extinct mammal of the Horse family, but not larger than
||a sheep, and having three toes on each foot.
Mes"o*labe (?), n. [L. mesolabium, Gr. &?;; me`sos middle + &?; to
take.] 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. Brande & C.
Mes"ole (?), n. [Gr. me`sos middle.] (Min.) Same as Thomsonite.
Mes"o*lite (?; 277), n. [Meso- + -lite.] (Min.) 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.
Mes`o*log"a*rithm (?), n. [Meso- + logarithm : cf. F. mésologarithme.]
(Math.) A logarithm of the cosine or cotangent. [Obs.] Kepler. Hutton.
||Mes`o*me"tri*um (?), n. [NL. See Meso-, and Metrium.] (Anat.) The
||fold of the peritoneum supporting the oviduct.
Mes`o*my*o"di*an (?), n. (Zoöl.) A bird having a mesomyodous larynx.
Mes`o*my"o*dous (?), a. [Meso- + Gr. &?;, &?;, a muscle.] (Zoöl.)
Having the intrinsic muscles of the larynx attached to the middle of
the semirings.
||Mes"on (?), n. [NL., fr. Gr. me`son middle, neut. of me`sos, a.,
||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.
Mes`o*na"sal (?), a. [Meso- + nasal.] (Anat.) Of or pertaining to the
middle portion of the nasal region.
Mes`o*neph"ric (?), a. (Anat.) Of or pertaining to the mesonephros; as,
the mesonephric, or Wolffian, duct.
||Mes`o*neph"ros (?), n. [NL., fr. Gr. 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.
||Mes`o*no"tum (?), n. [NL., fr. Gr. me`sos middle + nw^ton the back.]
||(Zoöl.) The dorsal portion of the mesothorax of insects.
||Mes`o*phlœ"um (?), n. [NL., fr. Gr. me`sos middle + floio`s bark.]
||(Bot.) The middle bark of a tree; the green layer of bark, usually
||soon covered by the outer or corky layer, and obliterated.
||Me*soph"ry*on (?), n. [NL., from Gr. meso`fryon.] (Anat.) See
||Glabella.
||Mes`o*phyl"lum (?), n. [NL., fr. Gr. me`sos middle + fy`llon leaf.]
||(Bot.) The parenchyma of a leaf between the skin of the two surfaces.
||Gray.
Mes"o*plast (?), n. [Meso- + -plast.] (Biol.) The nucleus of a cell;
mesoblast. Agassiz.
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Mes`o*po"di*al (ms`*p"d*al), a. (Anat.) Of or pertaining to the
mesopodialia or to the parts of the limbs to which they belong.
||Mes`o*po`di*a"le (?), n.; pl. Mesopodialia (#). [NL., fr. Gr. me`sos
||middle + &?;, dim. of poy`s, podo`s, foot.] (Anat.) One of the bones
||of either the carpus or tarsus.
||Mes`o*po"di*um (?), n. [NL. See Mesopodiale.] (Zoöl.) The middle
||portion of the foot in the Gastropoda and Pteropoda.
||Me*sop`te*ryg"i*um (?), n. [NL., fr. Gr. me`sos middle + &?; a fin.]
||(Anat.) The middle one of the three principal basal cartilages in the
||fins of fishes. -- ||Me*sop`ter*yg"i*al (#), a.
||Me*sor"chi*um (?), n. [NL., fr. Gr. 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.
||Mes`o*rec"tum (?), n. [Meso- + rectum.] (Anat.) The fold of
||peritoneum, or mesentery, attached to the rectum. -- Mes`o*rec"tal
||(#), a.
Mes"o*rhine (?), a. [Meso- + Gr. &?;, &?;, the nose.] (Anat.) Having
the nose of medium width; between leptorhine and platyrhine.
||Mes`o*sau"ri*a (?), n. Same as Mosasauria.
||Mes`o*scap"u*la (?), n. [Meso- + scapula.] (Anat.) A process from the
||middle of the scapula in some animals; the spine of the scapula.
Mes`o*scap"u*lar (?), a. (Anat.) Of or pertaining to the mesoscapula.
||Mes`o*scu"tum (?), n. [Meso- + scutum.] (Zoöl.) The scutum or dorsal
||plate of the middle thoracic segment of an insect. See Illust. of
||Butterfly.
Mes"o*seme (?), a. [Meso- + Gr. &?; sign, mark; cf. F. mésosème.]
(Anat.) Having a medium orbital index; having orbits neither broad nor
narrow; between megaseme and microseme.
Mes`o*sid"er*ite (?), n. [Meso- + siderite.] (Min.) See the Note under
Meteorite.
Mes"o*sperm (?), n. [Meso- + Gr. &?; seed: cf. F. mésosperme.] (Bot.) A
membrane of a seed. See Secundine.
Mes"o*state (?), n. [Meso- + Gr. &?; 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.
Mes`o*ster"nal (?), a. (Anat.) Of or pertaining to the mesosternum.
||Mes`o*ster"num (?), n. [Meso- + sternum.]