MESOSTERNUM
Mes`o*ster"num, n. Etym: [Meso- + sternum.]
1. (Anat.)
Defn: The middle portion, or body, of the sternum.
2. (Zoöl.)
Defn: The ventral piece of the middle segment of the thorax in insects.
MESOTARTARIC
Mes`o*tar*tar"ic, a. Etym: [Meso- + tartaric.] (Chem.)
Defn: Pertaining to, or designating, an acid called also inactive tartaric acid.
MESOTHECA
Mes`o*the"ca, n. Etym: [NL., fr. Gr. (Zoöl.)
Defn: The middle layer of the gonophore in the Hydrozoa.
MESOTHELIUM
Mes`o*the"li*um, n. Etym: [NL., fr. Gr. thelium.] (Biol.)