Oat cell cancer
A type of lung cancer in which the cells are small, round and resemble oats. Also called small cell lung cancer.
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- OAE
otoacoustic emission test.
- Oocyte
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.
- Oogenesis
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.
- Oogonium
An ancestral cell that gives rise to an oocyte.
- Oophorectomy
The removal of one or both ovaries by surgery.