Mesonephros
(||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.
Mesonotum
(||Mes`o*no"tum) n. [NL., fr. Gr. me`sos middle + nw^ton the back.] (Zoöl.) The dorsal
portion of the mesothorax of insects.
Mesophlœum
(||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.
Mesophryon
(||Me*soph"ry*on) n. [NL., from Gr. meso`fryon.] (Anat.) See Glabella.
Mesophyllum
(||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.
Mesoplast
(Mes"o*plast) n. [Meso- + -plast.] (Biol.) The nucleus of a cell; mesoblast. Agassiz.
Mesopodial
(Mes`o*po"di*al) a. (Anat.) Of or pertaining to the mesopodialia or to the parts of the limbs
to which they belong.
Mesopodiale
(||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.
Mesopodium
(||Mes`o*po"di*um) n. [NL. See Mesopodiale.] (Zoöl.) The middle portion of the foot in
the Gastropoda and Pteropoda.
Mesopterygium
(||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.
Mesorchium
(||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.
Mesorectum
(||Mes`o*rec"tum) n. [Meso- + rectum.] (Anat.) The fold of peritoneum, or mesentery,
attached to the rectum. — Mes`o*rec"tal a.
Mesorhine
(Mes"o*rhine) a. [Meso- + Gr. the nose.] (Anat.) Having the nose of medium width; between
leptorhine and platyrhine.
Mesosauria
(||Mes`o*sau"ri*a) n. Same as Mosasauria.
Mesoscapula
(||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.
Mesoscapular
(Mes`o*scap"u*lar) a. (Anat.) Of or pertaining to the mesoscapula.
Mesoscutum
(||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.
Mesoseme
(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.
Mesosiderite
(Mes`o*sid"er*ite) n. [Meso- + siderite.] (Min.) See the Note under Meteorite.
Mesosperm
(Mes"o*sperm) n. [Meso- + Gr. seed: cf. F. mésosperme.] (Bot.) A membrane of a seed.
See Secundine.
Mesostate
(Mes"o*state) n. [Meso- + Gr. to make to stand.] (Physiol.) A product of metabolic action.
