Defn: 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. Etym: [NL., from Gr. (Anat.)

Defn: See Glabella.

MESOPHYLLUM
Mes`o*phyl"lum, n. Etym: [NL., fr. Gr. (Bot.)

Defn: The parenchyma of a leaf between the skin of the two surfaces.
Gray.

MESOPLAST
Mes"o*plast, n. Etym: [Meso- + -plast.] (Biol.)

Defn: The nucleus of a cell; mesoblast. Agassix.

MESOPODIAL
Mes`o*po"di*al, a. (Anat.)

Defn: 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. Etym: [NL., fr. Gr. (Anat.)