Mesocolon \Mes`o*co"lon\, n. [NL., fr. Gr. meso`kwlon; me`sos middle + kw^lon the colon: cf. F. m['e]soc[^o]lon.] (Anat.) The fold of peritoneum, or mesentery, attached to the colon. -- {Mes`o*col"ic}, a. [1913 Webster]