Occipital (ok-sip’it-al).  Pertaining to the back part of the head
                          (occiput).

Olfactory Nerves (ol-fak’-to-re).  Nerves of smell.

Omentum (o-men’tum).  An apron.  A fold of the peritoneum connecting the
                     abdominal organs with the stomach.

Ophthalmia (off-thal’-meah).  Inflammation of the eye.

Opiates (o’-pe-ats).  A preparation of opium.

Optic (op’tik).  Pertaining to vision or to the science of optics.

Optic nerve.  Nerve of sight.

Orthopnea (or-thop-ne’ah).  A condition marked by quick and labored
                           breathing and relief is only had by remaining
                           in an upright position.

Ossific (os-if ’-ik).  Producing bone.

Ossification (os’if-ik-a’shun).  The formation of bone.

Ovary (o’var-e).  One of a pair of glandular organs giving rise to ova
                 (eggs).

Ovariotomy (o-va-re-ot’-o-me).  Removal of an ovary.

Ovum (o’vum).  An egg; the reproductive cell of an animal or vegetable.

[904 Mothers’ remedies]

Oxygen (oks’e-gen).  A colorless, tasteless, odorless gas.

Palate (pal’-at).  The roof of the mouth.

Palpitation (pal-pit-a’shun).  A fluttering or throbbing, especially of the
                              heart, of which a person is conscious.

Palliative (pal’-e-a-tiv).  An agent that relieves or soothes the symptom
                           of a disease without curing it.

Panacea (pan-a-se’ah).  A cure-all.

Papilla (pap-il’-ah).  A small nipple-like eminence.

Paracentesis (par’-ah-sen-te’-sis).  Puncture of the wall of a cavity of
                                    the body, such as the chest, drum
                                    membrane, etc.

Paralytic (par-ah-lit’ik), Affected with paralysis.

Paralysis (par-al’-is-is).  “Palsy.”  A loss of motion or of sensation in a
                            part.

Paraplegia (par-ah-ple’jeah).  Paralysis of the lower half of the body or
                              of the lower extremities.

Parasite (par’ah-sit).  An animal or vegetable living upon or within
                       another organism, termed the host.

Paroxysm (par’oks-izm).  The periodic increase or crisis in the progress of
                        a disease.

Patella (pat-el’-ah).  The knee cap.

Pathology (path-ol’-oje).  The branch of medical science that treats of the
                          modifications of functions and changes of
                          structures caused by disease.

Pathognomonic (path-og-no-mon’ik).  Characterized by a disease
                                   distinguishing it from other diseases.