| var. of meso- before vowels: mesencephalon. |
| mes- pref. Variant of meso-. |
| meso- or mes- pref.
[Greek, from mesos, middle; see medhyo- in Indo-European roots.] |
mes- pref.
Variant of meso-.
meso- or mes-
pref.
In the middle; middle: mesoderm.
Intermediate: mesomere.
Mesentery: mesoileum.
Characterizing a superimposable isomer: meso-2,3-dichlorobutane.