According to early writers the framework was covered with horse or bullock hide (corium).
The word "corrigia" is taken from the word "corium," a skin of leather.
Thus the more resistant parts (the horn on the one hand, and the corium covering the foot on the other) are easily torn asunder.
It originates in the corium and presents two clinical varieties.
The mucous layer, the corium, and in the deep lesions the subcutaneous connective tissues also, are involved in the process.
These occur as thickenings and down-growths of the epithelium into the corium.
In some long-kept specimens the corium everywhere had become pale brown; more usually it assumes a dirty purplish lead-colour.
The latter find their support and attachment in solid calcareous needles, which develop from chalky deposits in the corium.
Terga: when the upper end of the valve is not corroded, there is a distinct beak, hollow within for a thread of corium.
Later there is formed below this a denser aggregation of the corium, which ultimately becomes the papilla of the hair.
1650s, from Latin corium "skin, hide, leather," related to cortex "bark," scortum "skin, hide," from PIE root *(s)ker- (1) "to cut" (cf. Sanskrit krtih "hide;" Old Church Slavonic scora "skin," Russian skora "hide," kora "bark;" Welsh corwg "boat made with leather skins;" Old English sceran "to cut, shear;" see shear (v.)). Related: Coriaceous.
corium co·ri·um (kôr'ē-əm)
n. pl. co·ri·a (kôr'ē-ə)