Defn: 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 coelum.
MESOTHORACIC
Mes`o*tho*rac"ic, a. (Zoöl.)
Defn: Of or pertaining to the mesothorax.
MESOTHORAX
Mes`o*tho"rax, n. Etym: [Meso- + thorax: cf. F. mésothorax.] (Zoöl.)
Defn: The middle segment of the thorax in insects. See Illust. of
Coleoptera.
MESOTHORIUM
Mes`o*tho"ri*um, n. [NL.; meso-+ thorium.] (Chem.)
Defn: A radioactive product intermediate between thorium and radiothorium, with a period of 5.5 years.
MESOTROCHAL
Mes"o*tro`chal, a. Etym: [Meso- + Gr. (Zoöl.)
Defn: Having the middle of the body surrounded by bands of cilia; — said of the larvæ of certain marine annelids.
MESOTYPE
Mes"o*type, n. Etym: [Meso- + -type: cf. F. mésotype.] (Min.)