Defn: Having a medium orbital index; having orbits neither broad nor narrow; between megaseme and microseme.
MESOSIDERITE
Mes`o*sid"er*ite, n. Etym: [Meso- + siderite.] (Min.)
Defn: See the Note under Meteorite.
MESOSPERM
Mes"o*sperm, n. Etym: [Meso- + Gr. mésosperme.] (Bot.)
Defn: A membrane of a seed. See Secundine.
MESOSTATE
Mes"o*state, n. Etym: [Meso- + Gr. (Physiol.)
Defn: A product of metabolic action.
Note: Every mesostate is either an anastate or katastate, according as it is formed by an anabolic or katabolic process. See Metabolism.
MESOSTERNAL
Mes`o*ster"nal, a. (Anat.)
Defn: Of or pertaining to the mesosternum.