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Webster 1913 Edition
Meson
‖
Mes′on
,Noun.
[NL., fr. Gr.
μέσον
middle, neut. of μέσος
, a., middle.] 1.
(Anat.)
The mesial plane dividing the body of an animal into similar right and left halves. The line in which it meets the dorsal surface has been called the
dorsimeson
, and the corresponding ventral edge the ventrimeson
. B. G. Wilder.