intercostal
Relating to or near a rib.

iodoform
Yellowish crystalline compound, CHI3, used as an antiseptic.

ipecac
Tropical American shrub (Cephaelis ipecacuanha) that yields emetine.
Medicinal preparation made from this shrub used to induce vomiting.

Iris Florentina (Florentine iris, orris, Iris germanica
florentina, Iris florentina)
German iris having large white flowers and a fragrant rhizome.

Irish moss (carrageen)
Edible North Atlantic seaweed (Chondrus crispus) that yields a
mucilaginous substance used medicinally and in preparing jellies.

iritis
Inflammation of the iris of the eye.

jalap
Eastern Mexican vine (Ipomoea purga) with tuberous roots that are dried,
powdered, and used as a cathartic.

jocose
Given to joking; merry; humorous.

kamala