The Collaborative International Dictionary
Mesophyllum
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.
Wiktionary
mesophyllum
n. (context botany English) The parenchyma of a leaf between the skin of the two surfaces.
Wikipedia
Mesophyllum
Mesophyllum is a genus of red alga belonging to the family Hapalidiaceae.