Various forms of conjunctivitis in newborns, usually contracted during
birth from passage through the infected birth canal of the mother.

orchitis
Inflammation of the testes, often the result of mumps or other
infection, trauma, or metastasis.

organdy (organdie)
Stiff transparent fabric of cotton or silk, used for trim, curtains, and
light apparel.

Origanum
Marjoram. Genus of mint-like plants (Origanum). The sweet marjoram (O.
Majorana) is aromatic and fragrant, and used in cooking. The wild
marjoram of Europe and America (O. vulgare) is less fragrant.

orris
Several species of iris with a fragrant rootstock, especially Iris
germanica, used in perfumes and cosmetics.

panada
Paste or gruel of bread crumbs, toast, or flour combined with milk,
stock, or water; used for soups or thickening sauces.

Paralysis Agitans (Parkinson's disease, shaking palsy)
Progressive nervous disease causing destruction of brain cells that
produce dopamine, muscular tremor, slowing of movement, partial facial
paralysis, peculiarity of gait and posture, and weakness.

paregoric