Category: Oa-Oq

The process of egg formation. The second “o” in oogenesis is pronounced separately from the first: o?o?gen?e?sis. The word was created from the prefix “oo-” (Greek oon, egg) + “genesis” (the coming into being of something) = the coming into being of the egg (the ovum). Oogenesis is in contrast to spermatogenesis, the process of sperm formation.

A female germ cell in the process of development. The oocyte is produced in the ovary by an ancestral cell called an oogonium and gives rise to the ovum (the egg), which can be fertilized.

Fungus infection of the nail bed under the fingernails or toenails. Onychomycosis makes the nails look white and opaque, thickened, and brittle. It usually produces no symptoms other than a cosmetic problem. Treatment includes avoiding artificial nails, using safer application techniques and only new artificial nails, and using topical and oral antifungal medications. Also known as nail fungus and tinea unguium.

The medical term for what is better known as an ingrown toenail. From onycho-, nail + crypto-, hidden or buried + -sis, condition.

Pertaining to the nails. Examples of medical terms involving “onycho-” include onychodystrophy (abnormal growth and development of the nails), onychomycosis (fungal infection of the nails), onychogryposis (abnormally curved nails) and onychoosteodysplasia (malformation of bones and nails).

In medicine, the first appearance of the signs or symptoms of an illness as, for example, the onset of rheumatoid arthritis.

A hallucinatory (dream-like) state that is caused by such conditions as prolonged sleep deprivation, sensory isolation, and drug use.

Failure from birth of central nervous system control over breathing while asleep. There are usually no breathing problems while awake. The involuntary (autonomic) control of respiration is impaired, but the voluntary control of ventilation which operates during waking hours is generally intact. There can, in addition, be problems with the motility of the esophagus and the colon. Reduced esophageal motility causes food to move too slowly down to…

The field of medicine that is devoted to cancer. Clinical oncology consists of three primary disciplines: medical oncology (the treatment of cancer with medicine, including chemotherapy), surgical oncology (the surgical aspects of cancer including biopsy, staging, and surgical resection of tumors), and radiation oncology (the treatment of cancer with therapeutic radiation).

A physician who specializes in the diagnosis and treatment of cancer. After a cancer diagnosis is made, it is the oncologist?s role to explain the cancer diagnosis and the meaning of the disease stage to the patient; discuss various treatment options; recommend the best course of treatment; deliver optimal care; and improve quality of life both through curative…