Idiosyncracy. Peculiarity of constitution or susceptibility.
Ilium. The upper part of the hip or haunch bone.
Ileum. The lower two-fifths of the small intestines.
Impacted. Wedged in or driven close.
Imperforate. Having no opening.
Inanition. Exhaustion from want of food.
Incompatible. Cannot be properly employed together.
Incontinence. Inability to hold.
Incisor. A fore or front tooth.
Incubation. Hatching; the maturing of contagious virus.