(kol-o-bo'-mah) [noXofiouv, to muti- late]. A congenital fissure of the iris, choroid, or eyelids. C, Fuchs', a small crescentic defect of the choroid at the lower border of the optic disc. C. palpebral, C. palpebra- rum, a form of partial ablepharia consisting in a fissure of the eyelid— most frequently the upper lid. Syn., Blepharocolobdma.