dor so median (dor so median)

[L. dor sum, the back, + medius, middle, + -an.] Situated in the midline of the back. Huxley. [Rare.] dorsomesal (dor-so-mes'al), a. Same as dors i mesal. [Rare.] dors i meson (dôr-si-mes'on), n. [ dorsum , same arv., coined by Wilder and Gage. The middle lengthwise line of the back. [Rare.]